21168790

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5279}}^1$

素因数の和:5687

約数の個数: 16

約数和(自身を含む): 38206080

約数和(自身を除く): 17037290

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 5279, 10558, 26395, 52790, 2116879, 4233758, 10584395, 21168790]

約数ペア:

[(1, 21168790), (2, 10584395), (5, 4233758), (10, 2116879), (401, 52790), (802, 26395), (2005, 10558), (4010, 5279)]