20644900

素因数分解:

$2^2\times 5^2\times {\mathrm{431}}^1\times {\mathrm{479}}^1$

素因数の和:924

約数の個数: 36

約数和(自身を含む): 44997120

約数和(自身を除く): 24352220

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 431, 479, 862, 958, 1724, 1916, 2155, 2395, 4310, 4790, 8620, 9580, 10775, 11975, 21550, 23950, 43100, 47900, 206449, 412898, 825796, 1032245, 2064490, 4128980, 5161225, 10322450, 20644900]

約数ペア:

[(1, 20644900), (2, 10322450), (4, 5161225), (5, 4128980), (10, 2064490), (20, 1032245), (25, 825796), (50, 412898), (100, 206449), (431, 47900), (479, 43100), (862, 23950), (958, 21550), (1724, 11975), (1916, 10775), (2155, 9580), (2395, 8620), (4310, 4790)]