19663640

素因数分解:

$2^3\times 5^1\times {\mathrm{491591}}^1$

素因数の和:491602

約数の個数: 16

約数和(自身を含む): 44243280

約数和(自身を除く): 24579640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491591, 983182, 1966364, 2457955, 3932728, 4915910, 9831820, 19663640]

約数ペア:

[(1, 19663640), (2, 9831820), (4, 4915910), (5, 3932728), (8, 2457955), (10, 1966364), (20, 983182), (40, 491591)]