21159895

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{233}}^1\times {\mathrm{443}}^1$

素因数の和:722

約数の個数: 16

約数和(自身を含む): 26181792

約数和(自身を除く): 5021897

約数列:

[1, 5, 41, 205, 233, 443, 1165, 2215, 9553, 18163, 47765, 90815, 103219, 516095, 4231979, 21159895]

約数ペア:

[(1, 21159895), (5, 4231979), (41, 516095), (205, 103219), (233, 90815), (443, 47765), (1165, 18163), (2215, 9553)]