21242640

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1451}}^1$

素因数の和:1528

約数の個数: 80

約数和(自身を含む): 66977856

約数和(自身を除く): 45735216

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 61, 80, 120, 122, 183, 240, 244, 305, 366, 488, 610, 732, 915, 976, 1220, 1451, 1464, 1830, 2440, 2902, 2928, 3660, 4353, 4880, 5804, 7255, 7320, 8706, 11608, 14510, 14640, 17412, 21765, 23216, 29020, 34824, 43530, 58040, 69648, 87060, 88511, 116080, 174120, 177022, 265533, 348240, 354044, 442555, 531066, 708088, 885110, 1062132, 1327665, 1416176, 1770220, 2124264, 2655330, 3540440, 4248528, 5310660, 7080880, 10621320, 21242640]

約数ペア:

[(1, 21242640), (2, 10621320), (3, 7080880), (4, 5310660), (5, 4248528), (6, 3540440), (8, 2655330), (10, 2124264), (12, 1770220), (15, 1416176), (16, 1327665), (20, 1062132), (24, 885110), (30, 708088), (40, 531066), (48, 442555), (60, 354044), (61, 348240), (80, 265533), (120, 177022), (122, 174120), (183, 116080), (240, 88511), (244, 87060), (305, 69648), (366, 58040), (488, 43530), (610, 34824), (732, 29020), (915, 23216), (976, 21765), (1220, 17412), (1451, 14640), (1464, 14510), (1830, 11608), (2440, 8706), (2902, 7320), (2928, 7255), (3660, 5804), (4353, 4880)]