21356587

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{443}}^1$

素因数の和:618

約数の個数: 16

約数和(自身を含む): 25062912

約数和(自身を除く): 3706325

約数列:

[1, 7, 71, 97, 443, 497, 679, 3101, 6887, 31453, 42971, 48209, 220171, 300797, 3050941, 21356587]

約数ペア:

[(1, 21356587), (7, 3050941), (71, 300797), (97, 220171), (443, 48209), (497, 42971), (679, 31453), (3101, 6887)]