21975490

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{20161}}^1$

素因数の和:20277

約数の個数: 16

約数和(自身を含む): 39920760

約数和(自身を除く): 17945270

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 20161, 40322, 100805, 201610, 2197549, 4395098, 10987745, 21975490]

約数ペア:

[(1, 21975490), (2, 10987745), (5, 4395098), (10, 2197549), (109, 201610), (218, 100805), (545, 40322), (1090, 20161)]