20654708

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{163}}^1\times {\mathrm{401}}^1$

素因数の和:647

約数の個数: 24

約数和(自身を含む): 36919680

約数和(自身を除く): 16264972

約数列:

[1, 2, 4, 79, 158, 163, 316, 326, 401, 652, 802, 1604, 12877, 25754, 31679, 51508, 63358, 65363, 126716, 130726, 261452, 5163677, 10327354, 20654708]

約数ペア:

[(1, 20654708), (2, 10327354), (4, 5163677), (79, 261452), (158, 130726), (163, 126716), (316, 65363), (326, 63358), (401, 51508), (652, 31679), (802, 25754), (1604, 12877)]