81109580

素因数分解:

$2^2\times 5^1\times {\mathrm{691}}^1\times {\mathrm{5869}}^1$

素因数の和:6569

約数の個数: 24

約数和(自身を含む): 170605680

約数和(自身を除く): 89496100

約数列:

[1, 2, 4, 5, 10, 20, 691, 1382, 2764, 3455, 5869, 6910, 11738, 13820, 23476, 29345, 58690, 117380, 4055479, 8110958, 16221916, 20277395, 40554790, 81109580]

約数ペア:

[(1, 81109580), (2, 40554790), (4, 20277395), (5, 16221916), (10, 8110958), (20, 4055479), (691, 117380), (1382, 58690), (2764, 29345), (3455, 23476), (5869, 13820), (6910, 11738)]