20731240

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12641}}^1$

素因数の和:12693

約数の個数: 32

約数和(自身を含む): 47786760

約数和(自身を除く): 27055520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12641, 25282, 50564, 63205, 101128, 126410, 252820, 505640, 518281, 1036562, 2073124, 2591405, 4146248, 5182810, 10365620, 20731240]

約数ペア:

[(1, 20731240), (2, 10365620), (4, 5182810), (5, 4146248), (8, 2591405), (10, 2073124), (20, 1036562), (40, 518281), (41, 505640), (82, 252820), (164, 126410), (205, 101128), (328, 63205), (410, 50564), (820, 25282), (1640, 12641)]