21117640

素因数分解:

$2^3\times 5^1\times {\mathrm{527941}}^1$

素因数の和:527952

約数の個数: 16

約数和(自身を含む): 47514780

約数和(自身を除く): 26397140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 527941, 1055882, 2111764, 2639705, 4223528, 5279410, 10558820, 21117640]

約数ペア:

[(1, 21117640), (2, 10558820), (4, 5279410), (5, 4223528), (8, 2639705), (10, 2111764), (20, 1055882), (40, 527941)]