16660625

素因数分解:

$5^4\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:123

約数の個数: 40

約数和(自身を含む): 23242560

約数和(自身を除く): 6581935

約数列:

[1, 5, 19, 23, 25, 61, 95, 115, 125, 305, 437, 475, 575, 625, 1159, 1403, 1525, 2185, 2375, 2875, 5795, 7015, 7625, 10925, 11875, 14375, 26657, 28975, 35075, 38125, 54625, 133285, 144875, 175375, 273125, 666425, 724375, 876875, 3332125, 16660625]

約数ペア:

[(1, 16660625), (5, 3332125), (19, 876875), (23, 724375), (25, 666425), (61, 273125), (95, 175375), (115, 144875), (125, 133285), (305, 54625), (437, 38125), (475, 35075), (575, 28975), (625, 26657), (1159, 14375), (1403, 11875), (1525, 10925), (2185, 7625), (2375, 7015), (2875, 5795)]