19991621

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{439}}^1$

素因数の和:596

約数の個数: 16

約数和(自身を含む): 22471680

約数和(自身を除く): 2480059

約数列:

[1, 13, 31, 113, 403, 439, 1469, 3503, 5707, 13609, 45539, 49607, 176917, 644891, 1537817, 19991621]

約数ペア:

[(1, 19991621), (13, 1537817), (31, 644891), (113, 176917), (403, 49607), (439, 45539), (1469, 13609), (3503, 5707)]