20405450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31393}}^1$

素因数の和:31418

約数の個数: 24

約数和(自身を含む): 40874988

約数和(自身を除く): 20469538

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 325, 650, 31393, 62786, 156965, 313930, 408109, 784825, 816218, 1569650, 2040545, 4081090, 10202725, 20405450]

約数ペア:

[(1, 20405450), (2, 10202725), (5, 4081090), (10, 2040545), (13, 1569650), (25, 816218), (26, 784825), (50, 408109), (65, 313930), (130, 156965), (325, 62786), (650, 31393)]