21459815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{8923}}^1$

素因数の和:8978

約数の個数: 16

約数和(自身を含む): 28485408

約数和(自身を除く): 7025593

約数列:

[1, 5, 13, 37, 65, 185, 481, 2405, 8923, 44615, 115999, 330151, 579995, 1650755, 4291963, 21459815]

約数ペア:

[(1, 21459815), (5, 4291963), (13, 1650755), (37, 579995), (65, 330151), (185, 115999), (481, 44615), (2405, 8923)]