21000272960

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1\times {\mathrm{211}}^1$

素因数の和:465

約数の個数: 224

約数和(自身を含む): 52934737920

約数和(自身を除く): 31934464960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 79, 80, 124, 127, 155, 158, 160, 211, 248, 254, 310, 316, 320, 395, 422, 496, 508, 620, 632, 635, 790, 844, 992, 1016, 1055, 1240, 1264, 1270, 1580, 1688, 1984, 2032, 2110, 2449, 2480, 2528, 2540, 3160, 3376, 3937, 4064, 4220, 4898, 4960, 5056, 5080, 6320, 6541, 6752, 7874, 8128, 8440, 9796, 9920, 10033, 10160, 12245, 12640, 13082, 13504, 15748, 16669, 16880, 19592, 19685, 20066, 20320, 24490, 25280, 26164, 26797, 31496, 32705, 33338, 33760, 39184, 39370, 40132, 40640, 48980, 50165, 52328, 53594, 62992, 65410, 66676, 67520, 78368, 78740, 80264, 83345, 97960, 100330, 104656, 107188, 125984, 130820, 133352, 133985, 156736, 157480, 160528, 166690, 195920, 200660, 209312, 214376, 251968, 261640, 266704, 267970, 311023, 314960, 321056, 333380, 391840, 401320, 418624, 428752, 516739, 523280, 533408, 535940, 622046, 629920, 642112, 666760, 783680, 802640, 830707, 857504, 1033478, 1046560, 1066816, 1071880, 1244092, 1259840, 1333520, 1555115, 1605280, 1661414, 1715008, 2066956, 2093120, 2116963, 2143760, 2488184, 2583695, 2667040, 3110230, 3210560, 3322828, 4133912, 4153535, 4233926, 4287520, 4976368, 5167390, 5334080, 6220460, 6645656, 8267824, 8307070, 8467852, 8575040, 9952736, 10334780, 10584815, 12440920, 13291312, 16535648, 16614140, 16935704, 19905472, 20669560, 21169630, 24881840, 26582624, 33071296, 33228280, 33871408, 41339120, 42339260, 49763680, 53165248, 65625853, 66456560, 67742816, 82678240, 84678520, 99527360, 131251706, 132913120, 135485632, 165356480, 169357040, 262503412, 265826240, 328129265, 338714080, 525006824, 656258530, 677428160, 1050013648, 1312517060, 2100027296, 2625034120, 4200054592, 5250068240, 10500136480, 21000272960]

約数ペア:

[(1, 21000272960), (2, 10500136480), (4, 5250068240), (5, 4200054592), (8, 2625034120), (10, 2100027296), (16, 1312517060), (20, 1050013648), (31, 677428160), (32, 656258530), (40, 525006824), (62, 338714080), (64, 328129265), (79, 265826240), (80, 262503412), (124, 169357040), (127, 165356480), (155, 135485632), (158, 132913120), (160, 131251706), (211, 99527360), (248, 84678520), (254, 82678240), (310, 67742816), (316, 66456560), (320, 65625853), (395, 53165248), (422, 49763680), (496, 42339260), (508, 41339120), (620, 33871408), (632, 33228280), (635, 33071296), (790, 26582624), (844, 24881840), (992, 21169630), (1016, 20669560), (1055, 19905472), (1240, 16935704), (1264, 16614140), (1270, 16535648), (1580, 13291312), (1688, 12440920), (1984, 10584815), (2032, 10334780), (2110, 9952736), (2449, 8575040), (2480, 8467852), (2528, 8307070), (2540, 8267824), (3160, 6645656), (3376, 6220460), (3937, 5334080), (4064, 5167390), (4220, 4976368), (4898, 4287520), (4960, 4233926), (5056, 4153535), (5080, 4133912), (6320, 3322828), (6541, 3210560), (6752, 3110230), (7874, 2667040), (8128, 2583695), (8440, 2488184), (9796, 2143760), (9920, 2116963), (10033, 2093120), (10160, 2066956), (12245, 1715008), (12640, 1661414), (13082, 1605280), (13504, 1555115), (15748, 1333520), (16669, 1259840), (16880, 1244092), (19592, 1071880), (19685, 1066816), (20066, 1046560), (20320, 1033478), (24490, 857504), (25280, 830707), (26164, 802640), (26797, 783680), (31496, 666760), (32705, 642112), (33338, 629920), (33760, 622046), (39184, 535940), (39370, 533408), (40132, 523280), (40640, 516739), (48980, 428752), (50165, 418624), (52328, 401320), (53594, 391840), (62992, 333380), (65410, 321056), (66676, 314960), (67520, 311023), (78368, 267970), (78740, 266704), (80264, 261640), (83345, 251968), (97960, 214376), (100330, 209312), (104656, 200660), (107188, 195920), (125984, 166690), (130820, 160528), (133352, 157480), (133985, 156736)]