20781865

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{5419}}^1$

素因数の和:5496

約数の個数: 16

約数和(自身を含む): 27316800

約数和(自身を除く): 6534935

約数列:

[1, 5, 13, 59, 65, 295, 767, 3835, 5419, 27095, 70447, 319721, 352235, 1598605, 4156373, 20781865]

約数ペア:

[(1, 20781865), (5, 4156373), (13, 1598605), (59, 352235), (65, 319721), (295, 70447), (767, 27095), (3835, 5419)]