28651340

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{20177}}^1$

素因数の和:20257

約数の個数: 24

約数和(自身を含む): 61018272

約数和(自身を除く): 32366932

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 20177, 40354, 80708, 100885, 201770, 403540, 1432567, 2865134, 5730268, 7162835, 14325670, 28651340]

約数ペア:

[(1, 28651340), (2, 14325670), (4, 7162835), (5, 5730268), (10, 2865134), (20, 1432567), (71, 403540), (142, 201770), (284, 100885), (355, 80708), (710, 40354), (1420, 20177)]