21004010

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{123553}}^1$

素因数の和:123577

約数の個数: 16

約数和(自身を含む): 40031496

約数和(自身を除く): 19027486

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 123553, 247106, 617765, 1235530, 2100401, 4200802, 10502005, 21004010]

約数ペア:

[(1, 21004010), (2, 10502005), (5, 4200802), (10, 2100401), (17, 1235530), (34, 617765), (85, 247106), (170, 123553)]