20148605

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{2131}}^1$

素因数の和:2228

約数の個数: 16

約数和(自身を含む): 25379328

約数和(自身を除く): 5230723

約数列:

[1, 5, 31, 61, 155, 305, 1891, 2131, 9455, 10655, 66061, 129991, 330305, 649955, 4029721, 20148605]

約数ペア:

[(1, 20148605), (5, 4029721), (31, 649955), (61, 330305), (155, 129991), (305, 66061), (1891, 10655), (2131, 9455)]