21530005

素因数分解:

$5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{5749}}^1$

素因数の和:5868

約数の個数: 16

約数和(自身を含む): 29808000

約数和(自身を除く): 8277995

約数列:

[1, 5, 7, 35, 107, 535, 749, 3745, 5749, 28745, 40243, 201215, 615143, 3075715, 4306001, 21530005]

約数ペア:

[(1, 21530005), (5, 4306001), (7, 3075715), (35, 615143), (107, 201215), (535, 40243), (749, 28745), (3745, 5749)]