21390585

素因数分解:

$3^1\times 5^1\times {\mathrm{173}}^1\times {\mathrm{8243}}^1$

素因数の和:8424

約数の個数: 16

約数和(自身を含む): 34426944

約数和(自身を除く): 13036359

約数列:

[1, 3, 5, 15, 173, 519, 865, 2595, 8243, 24729, 41215, 123645, 1426039, 4278117, 7130195, 21390585]

約数ペア:

[(1, 21390585), (3, 7130195), (5, 4278117), (15, 1426039), (173, 123645), (519, 41215), (865, 24729), (2595, 8243)]