18870020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72577}}^1$

素因数の和:72599

約数の個数: 24

約数和(自身を含む): 42675864

約数和(自身を除く): 23805844

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72577, 145154, 290308, 362885, 725770, 943501, 1451540, 1887002, 3774004, 4717505, 9435010, 18870020]

約数ペア:

[(1, 18870020), (2, 9435010), (4, 4717505), (5, 3774004), (10, 1887002), (13, 1451540), (20, 943501), (26, 725770), (52, 362885), (65, 290308), (130, 145154), (260, 72577)]