20403580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{32909}}^1$

素因数の和:32949

約数の個数: 24

約数和(自身を含む): 44231040

約数和(自身を除く): 23827460

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 32909, 65818, 131636, 164545, 329090, 658180, 1020179, 2040358, 4080716, 5100895, 10201790, 20403580]

約数ペア:

[(1, 20403580), (2, 10201790), (4, 5100895), (5, 4080716), (10, 2040358), (20, 1020179), (31, 658180), (62, 329090), (124, 164545), (155, 131636), (310, 65818), (620, 32909)]