20541580

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13001}}^1$

素因数の和:13089

約数の個数: 24

約数和(自身を含む): 43686720

約数和(自身を除く): 23145140

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13001, 26002, 52004, 65005, 130010, 260020, 1027079, 2054158, 4108316, 5135395, 10270790, 20541580]

約数ペア:

[(1, 20541580), (2, 10270790), (4, 5135395), (5, 4108316), (10, 2054158), (20, 1027079), (79, 260020), (158, 130010), (316, 65005), (395, 52004), (790, 26002), (1580, 13001)]