20908990

素因数分解:

$2^1\times 5^1\times {\mathrm{179}}^1\times {\mathrm{11681}}^1$

素因数の和:11867

約数の個数: 16

約数和(自身を含む): 37849680

約数和(自身を除く): 16940690

約数列:

[1, 2, 5, 10, 179, 358, 895, 1790, 11681, 23362, 58405, 116810, 2090899, 4181798, 10454495, 20908990]

約数ペア:

[(1, 20908990), (2, 10454495), (5, 4181798), (10, 2090899), (179, 116810), (358, 58405), (895, 23362), (1790, 11681)]