20987475

素因数分解:

$3^1\times 5^2\times {\mathrm{233}}^1\times {\mathrm{1201}}^1$

素因数の和:1447

約数の個数: 24

約数和(自身を含む): 34877232

約数和(自身を除く): 13889757

約数列:

[1, 3, 5, 15, 25, 75, 233, 699, 1165, 1201, 3495, 3603, 5825, 6005, 17475, 18015, 30025, 90075, 279833, 839499, 1399165, 4197495, 6995825, 20987475]

約数ペア:

[(1, 20987475), (3, 6995825), (5, 4197495), (15, 1399165), (25, 839499), (75, 279833), (233, 90075), (699, 30025), (1165, 18015), (1201, 17475), (3495, 6005), (3603, 5825)]