19917820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76607}}^1$

素因数の和:76629

約数の個数: 24

約数和(自身を含む): 45045504

約数和(自身を除く): 25127684

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76607, 153214, 306428, 383035, 766070, 995891, 1532140, 1991782, 3983564, 4979455, 9958910, 19917820]

約数ペア:

[(1, 19917820), (2, 9958910), (4, 4979455), (5, 3983564), (10, 1991782), (13, 1532140), (20, 995891), (26, 766070), (52, 383035), (65, 306428), (130, 153214), (260, 76607)]