20779240

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{3187}}^1$

素因数の和:3361

約数の個数: 32

約数和(自身を含む): 47054880

約数和(自身を除く): 26275640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3187, 3260, 6374, 6520, 12748, 15935, 25496, 31870, 63740, 127480, 519481, 1038962, 2077924, 2597405, 4155848, 5194810, 10389620, 20779240]

約数ペア:

[(1, 20779240), (2, 10389620), (4, 5194810), (5, 4155848), (8, 2597405), (10, 2077924), (20, 1038962), (40, 519481), (163, 127480), (326, 63740), (652, 31870), (815, 25496), (1304, 15935), (1630, 12748), (3187, 6520), (3260, 6374)]