20671885

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10259}}^1$

素因数の和:10308

約数の個数: 16

約数和(自身を含む): 27578880

約数和(自身を除く): 6906995

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 10259, 51295, 133367, 318029, 666835, 1590145, 4134377, 20671885]

約数ペア:

[(1, 20671885), (5, 4134377), (13, 1590145), (31, 666835), (65, 318029), (155, 133367), (403, 51295), (2015, 10259)]