20128575

素因数分解:

$3^1\times 5^2\times {\mathrm{349}}^1\times {\mathrm{769}}^1$

素因数の和:1131

約数の個数: 24

約数和(自身を含む): 33418000

約数和(自身を除く): 13289425

約数列:

[1, 3, 5, 15, 25, 75, 349, 769, 1047, 1745, 2307, 3845, 5235, 8725, 11535, 19225, 26175, 57675, 268381, 805143, 1341905, 4025715, 6709525, 20128575]

約数ペア:

[(1, 20128575), (3, 6709525), (5, 4025715), (15, 1341905), (25, 805143), (75, 268381), (349, 57675), (769, 26175), (1047, 19225), (1745, 11535), (2307, 8725), (3845, 5235)]