21017887

素因数分解:

${\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{457}}^1$

素因数の和:618

約数の個数: 16

約数和(自身を含む): 23808672

約数和(自身を除く): 2790785

約数列:

[1, 11, 37, 113, 407, 457, 1243, 4181, 5027, 16909, 45991, 51641, 185999, 568051, 1910717, 21017887]

約数ペア:

[(1, 21017887), (11, 1910717), (37, 568051), (113, 185999), (407, 51641), (457, 45991), (1243, 16909), (4181, 5027)]