21406895

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{827}}^1$

素因数の和:1030

約数の個数: 16

約数和(自身を含む): 26707968

約数和(自身を除く): 5301073

約数列:

[1, 5, 31, 155, 167, 827, 835, 4135, 5177, 25637, 25885, 128185, 138109, 690545, 4281379, 21406895]

約数ペア:

[(1, 21406895), (5, 4281379), (31, 690545), (155, 138109), (167, 128185), (827, 25885), (835, 25637), (4135, 5177)]