21188590

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{26821}}^1$

素因数の和:26907

約数の個数: 16

約数和(自身を含む): 38623680

約数和(自身を除く): 17435090

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 26821, 53642, 134105, 268210, 2118859, 4237718, 10594295, 21188590]

約数ペア:

[(1, 21188590), (2, 10594295), (5, 4237718), (10, 2118859), (79, 268210), (158, 134105), (395, 53642), (790, 26821)]