19783640

素因数分解:

$2^3\times 5^1\times {\mathrm{494591}}^1$

素因数の和:494602

約数の個数: 16

約数和(自身を含む): 44513280

約数和(自身を除く): 24729640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 494591, 989182, 1978364, 2472955, 3956728, 4945910, 9891820, 19783640]

約数ペア:

[(1, 19783640), (2, 9891820), (4, 4945910), (5, 3956728), (8, 2472955), (10, 1978364), (20, 989182), (40, 494591)]