7981240

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{3271}}^1$

素因数の和:3343

約数の個数: 32

約数和(自身を含む): 18257760

約数和(自身を除く): 10276520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 3271, 6542, 13084, 16355, 26168, 32710, 65420, 130840, 199531, 399062, 798124, 997655, 1596248, 1995310, 3990620, 7981240]

約数ペア:

[(1, 7981240), (2, 3990620), (4, 1995310), (5, 1596248), (8, 997655), (10, 798124), (20, 399062), (40, 199531), (61, 130840), (122, 65420), (244, 32710), (305, 26168), (488, 16355), (610, 13084), (1220, 6542), (2440, 3271)]