19720495

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{2707}}^1$

素因数の和:2790

約数の個数: 16

約数和(自身を含む): 24956928

約数和(自身を除く): 5236433

約数列:

[1, 5, 31, 47, 155, 235, 1457, 2707, 7285, 13535, 83917, 127229, 419585, 636145, 3944099, 19720495]

約数ペア:

[(1, 19720495), (5, 3944099), (31, 636145), (47, 419585), (155, 127229), (235, 83917), (1457, 13535), (2707, 7285)]