20450120

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2423}}^1$

素因数の和:2645

約数の個数: 32

約数和(自身を含む): 46249920

約数和(自身を除く): 25799800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 2423, 4220, 4846, 8440, 9692, 12115, 19384, 24230, 48460, 96920, 511253, 1022506, 2045012, 2556265, 4090024, 5112530, 10225060, 20450120]

約数ペア:

[(1, 20450120), (2, 10225060), (4, 5112530), (5, 4090024), (8, 2556265), (10, 2045012), (20, 1022506), (40, 511253), (211, 96920), (422, 48460), (844, 24230), (1055, 19384), (1688, 12115), (2110, 9692), (2423, 8440), (4220, 4846)]