21840945

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{208009}}^1$

素因数の和:208024

約数の個数: 16

約数和(自身を含む): 39937920

約数和(自身を除く): 18096975

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 208009, 624027, 1040045, 1456063, 3120135, 4368189, 7280315, 21840945]

約数ペア:

[(1, 21840945), (3, 7280315), (5, 4368189), (7, 3120135), (15, 1456063), (21, 1040045), (35, 624027), (105, 208009)]