21271665

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61657}}^1$

素因数の和:61688

約数の個数: 16

約数和(自身を含む): 35515008

約数和(自身を除く): 14243343

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61657, 184971, 308285, 924855, 1418111, 4254333, 7090555, 21271665]

約数ペア:

[(1, 21271665), (3, 7090555), (5, 4254333), (15, 1418111), (23, 924855), (69, 308285), (115, 184971), (345, 61657)]