18145975

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{163}}^1$

素因数の和:307

約数の個数: 24

約数和(自身を含む): 23325392

約数和(自身を除く): 5179417

約数列:

[1, 5, 25, 61, 73, 163, 305, 365, 815, 1525, 1825, 4075, 4453, 9943, 11899, 22265, 49715, 59495, 111325, 248575, 297475, 725839, 3629195, 18145975]

約数ペア:

[(1, 18145975), (5, 3629195), (25, 725839), (61, 297475), (73, 248575), (163, 111325), (305, 59495), (365, 49715), (815, 22265), (1525, 11899), (1825, 9943), (4075, 4453)]