19980565

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{12527}}^1$

素因数の和:12572

約数の個数: 16

約数和(自身を含む): 27060480

約数和(自身を除く): 7079915

約数列:

[1, 5, 11, 29, 55, 145, 319, 1595, 12527, 62635, 137797, 363283, 688985, 1816415, 3996113, 19980565]

約数ペア:

[(1, 19980565), (5, 3996113), (11, 1816415), (29, 688985), (55, 363283), (145, 137797), (319, 62635), (1595, 12527)]