628009640

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{257381}}^1$

素因数の和:257453

約数の個数: 32

約数和(自身を含む): 1436191560

約数和(自身を除く): 808181920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 257381, 514762, 1029524, 1286905, 2059048, 2573810, 5147620, 10295240, 15700241, 31400482, 62800964, 78501205, 125601928, 157002410, 314004820, 628009640]

約数ペア:

[(1, 628009640), (2, 314004820), (4, 157002410), (5, 125601928), (8, 78501205), (10, 62800964), (20, 31400482), (40, 15700241), (61, 10295240), (122, 5147620), (244, 2573810), (305, 2059048), (488, 1286905), (610, 1029524), (1220, 514762), (2440, 257381)]