21439600

素因数分解:

$2^4\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:88

約数の個数: 240

約数和(自身を含む): 68884480

約数和(自身を除く): 47444880

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 19, 20, 25, 26, 28, 31, 35, 38, 40, 50, 52, 56, 62, 65, 70, 76, 80, 91, 95, 100, 104, 112, 124, 130, 133, 140, 152, 155, 175, 182, 190, 200, 208, 217, 247, 248, 260, 266, 280, 304, 310, 325, 350, 364, 380, 400, 403, 434, 455, 475, 494, 496, 520, 532, 560, 589, 620, 650, 665, 700, 728, 760, 775, 806, 868, 910, 950, 988, 1040, 1064, 1085, 1178, 1235, 1240, 1300, 1330, 1400, 1456, 1520, 1550, 1612, 1729, 1736, 1820, 1900, 1976, 2015, 2128, 2170, 2275, 2356, 2470, 2480, 2600, 2660, 2800, 2821, 2945, 3100, 3224, 3325, 3458, 3472, 3640, 3800, 3952, 4030, 4123, 4340, 4550, 4712, 4940, 5200, 5320, 5425, 5642, 5890, 6175, 6200, 6448, 6650, 6916, 7280, 7600, 7657, 8060, 8246, 8645, 8680, 9100, 9424, 9880, 10075, 10640, 10850, 11284, 11780, 12350, 12400, 13300, 13832, 14105, 14725, 15314, 16120, 16492, 17290, 17360, 18200, 19760, 20150, 20615, 21700, 22568, 23560, 24700, 26600, 27664, 28210, 29450, 30628, 32240, 32984, 34580, 36400, 38285, 40300, 41230, 43225, 43400, 45136, 47120, 49400, 53200, 53599, 56420, 58900, 61256, 65968, 69160, 70525, 76570, 80600, 82460, 86450, 86800, 98800, 103075, 107198, 112840, 117800, 122512, 138320, 141050, 153140, 161200, 164920, 172900, 191425, 206150, 214396, 225680, 235600, 267995, 282100, 306280, 329840, 345800, 382850, 412300, 428792, 535990, 564200, 612560, 691600, 765700, 824600, 857584, 1071980, 1128400, 1339975, 1531400, 1649200, 2143960, 2679950, 3062800, 4287920, 5359900, 10719800, 21439600]

約数ペア:

[(1, 21439600), (2, 10719800), (4, 5359900), (5, 4287920), (7, 3062800), (8, 2679950), (10, 2143960), (13, 1649200), (14, 1531400), (16, 1339975), (19, 1128400), (20, 1071980), (25, 857584), (26, 824600), (28, 765700), (31, 691600), (35, 612560), (38, 564200), (40, 535990), (50, 428792), (52, 412300), (56, 382850), (62, 345800), (65, 329840), (70, 306280), (76, 282100), (80, 267995), (91, 235600), (95, 225680), (100, 214396), (104, 206150), (112, 191425), (124, 172900), (130, 164920), (133, 161200), (140, 153140), (152, 141050), (155, 138320), (175, 122512), (182, 117800), (190, 112840), (200, 107198), (208, 103075), (217, 98800), (247, 86800), (248, 86450), (260, 82460), (266, 80600), (280, 76570), (304, 70525), (310, 69160), (325, 65968), (350, 61256), (364, 58900), (380, 56420), (400, 53599), (403, 53200), (434, 49400), (455, 47120), (475, 45136), (494, 43400), (496, 43225), (520, 41230), (532, 40300), (560, 38285), (589, 36400), (620, 34580), (650, 32984), (665, 32240), (700, 30628), (728, 29450), (760, 28210), (775, 27664), (806, 26600), (868, 24700), (910, 23560), (950, 22568), (988, 21700), (1040, 20615), (1064, 20150), (1085, 19760), (1178, 18200), (1235, 17360), (1240, 17290), (1300, 16492), (1330, 16120), (1400, 15314), (1456, 14725), (1520, 14105), (1550, 13832), (1612, 13300), (1729, 12400), (1736, 12350), (1820, 11780), (1900, 11284), (1976, 10850), (2015, 10640), (2128, 10075), (2170, 9880), (2275, 9424), (2356, 9100), (2470, 8680), (2480, 8645), (2600, 8246), (2660, 8060), (2800, 7657), (2821, 7600), (2945, 7280), (3100, 6916), (3224, 6650), (3325, 6448), (3458, 6200), (3472, 6175), (3640, 5890), (3800, 5642), (3952, 5425), (4030, 5320), (4123, 5200), (4340, 4940), (4550, 4712)]