18810025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1867}}^1$

素因数の和:1921

約数の個数: 24

約数和(自身を含む): 25942784

約数和(自身を除く): 7132759

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 1867, 2015, 9335, 10075, 24271, 46675, 57877, 121355, 289385, 606775, 752401, 1446925, 3762005, 18810025]

約数ペア:

[(1, 18810025), (5, 3762005), (13, 1446925), (25, 752401), (31, 606775), (65, 289385), (155, 121355), (325, 57877), (403, 46675), (775, 24271), (1867, 10075), (2015, 9335)]