20210815880

素因数分解:

$2^3\times 5^1\times {\mathrm{505270397}}^1$

素因数の和:505270408

約数の個数: 16

約数和(自身を含む): 45474335820

約数和(自身を除く): 25263519940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 505270397, 1010540794, 2021081588, 2526351985, 4042163176, 5052703970, 10105407940, 20210815880]

約数ペア:

[(1, 20210815880), (2, 10105407940), (4, 5052703970), (5, 4042163176), (8, 2526351985), (10, 2021081588), (20, 1010540794), (40, 505270397)]