21267987

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{443}}^1\times {\mathrm{1231}}^1$

素因数の和:1690

約数の個数: 16

約数和(自身を含む): 30632448

約数和(自身を除く): 9364461

約数列:

[1, 3, 13, 39, 443, 1231, 1329, 3693, 5759, 16003, 17277, 48009, 545333, 1635999, 7089329, 21267987]

約数ペア:

[(1, 21267987), (3, 7089329), (13, 1635999), (39, 545333), (443, 48009), (1231, 17277), (1329, 16003), (3693, 5759)]