21119995

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{4451}}^1$

素因数の和:4542

約数の個数: 16

約数和(自身を含む): 27673632

約数和(自身を除く): 6553637

約数列:

[1, 5, 13, 65, 73, 365, 949, 4451, 4745, 22255, 57863, 289315, 324923, 1624615, 4223999, 21119995]

約数ペア:

[(1, 21119995), (5, 4223999), (13, 1624615), (65, 324923), (73, 289315), (365, 57863), (949, 22255), (4451, 4745)]