21375120

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:90

約数の個数: 240

約数和(自身を含む): 78423552

約数和(自身を除く): 57048432

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 17, 20, 24, 26, 30, 31, 34, 39, 40, 48, 51, 52, 60, 62, 65, 68, 78, 80, 85, 93, 102, 104, 120, 124, 130, 136, 155, 156, 169, 170, 186, 195, 204, 208, 221, 240, 248, 255, 260, 272, 310, 312, 338, 340, 372, 390, 403, 408, 442, 465, 496, 507, 510, 520, 527, 620, 624, 663, 676, 680, 744, 780, 806, 816, 845, 884, 930, 1014, 1020, 1040, 1054, 1105, 1209, 1240, 1326, 1352, 1360, 1488, 1560, 1581, 1612, 1690, 1768, 1860, 2015, 2028, 2040, 2108, 2210, 2418, 2480, 2535, 2635, 2652, 2704, 2873, 3120, 3162, 3224, 3315, 3380, 3536, 3720, 4030, 4056, 4080, 4216, 4420, 4836, 5070, 5239, 5270, 5304, 5746, 6045, 6324, 6448, 6630, 6760, 6851, 7440, 7905, 8060, 8112, 8432, 8619, 8840, 9672, 10140, 10478, 10540, 10608, 11492, 12090, 12648, 13260, 13520, 13702, 14365, 15717, 15810, 16120, 17238, 17680, 19344, 20280, 20553, 20956, 21080, 22984, 24180, 25296, 26195, 26520, 27404, 28730, 31434, 31620, 32240, 34255, 34476, 40560, 41106, 41912, 42160, 43095, 45968, 48360, 52390, 53040, 54808, 57460, 62868, 63240, 68510, 68952, 78585, 82212, 83824, 86190, 89063, 96720, 102765, 104780, 109616, 114920, 125736, 126480, 137020, 137904, 157170, 164424, 172380, 178126, 205530, 209560, 229840, 251472, 267189, 274040, 314340, 328848, 344760, 356252, 411060, 419120, 445315, 534378, 548080, 628680, 689520, 712504, 822120, 890630, 1068756, 1257360, 1335945, 1425008, 1644240, 1781260, 2137512, 2671890, 3562520, 4275024, 5343780, 7125040, 10687560, 21375120]

約数ペア:

[(1, 21375120), (2, 10687560), (3, 7125040), (4, 5343780), (5, 4275024), (6, 3562520), (8, 2671890), (10, 2137512), (12, 1781260), (13, 1644240), (15, 1425008), (16, 1335945), (17, 1257360), (20, 1068756), (24, 890630), (26, 822120), (30, 712504), (31, 689520), (34, 628680), (39, 548080), (40, 534378), (48, 445315), (51, 419120), (52, 411060), (60, 356252), (62, 344760), (65, 328848), (68, 314340), (78, 274040), (80, 267189), (85, 251472), (93, 229840), (102, 209560), (104, 205530), (120, 178126), (124, 172380), (130, 164424), (136, 157170), (155, 137904), (156, 137020), (169, 126480), (170, 125736), (186, 114920), (195, 109616), (204, 104780), (208, 102765), (221, 96720), (240, 89063), (248, 86190), (255, 83824), (260, 82212), (272, 78585), (310, 68952), (312, 68510), (338, 63240), (340, 62868), (372, 57460), (390, 54808), (403, 53040), (408, 52390), (442, 48360), (465, 45968), (496, 43095), (507, 42160), (510, 41912), (520, 41106), (527, 40560), (620, 34476), (624, 34255), (663, 32240), (676, 31620), (680, 31434), (744, 28730), (780, 27404), (806, 26520), (816, 26195), (845, 25296), (884, 24180), (930, 22984), (1014, 21080), (1020, 20956), (1040, 20553), (1054, 20280), (1105, 19344), (1209, 17680), (1240, 17238), (1326, 16120), (1352, 15810), (1360, 15717), (1488, 14365), (1560, 13702), (1581, 13520), (1612, 13260), (1690, 12648), (1768, 12090), (1860, 11492), (2015, 10608), (2028, 10540), (2040, 10478), (2108, 10140), (2210, 9672), (2418, 8840), (2480, 8619), (2535, 8432), (2635, 8112), (2652, 8060), (2704, 7905), (2873, 7440), (3120, 6851), (3162, 6760), (3224, 6630), (3315, 6448), (3380, 6324), (3536, 6045), (3720, 5746), (4030, 5304), (4056, 5270), (4080, 5239), (4216, 5070), (4420, 4836)]