19800405

素因数分解:

$3^2\times 5^1\times {\mathrm{440009}}^1$

素因数の和:440020

約数の個数: 12

約数和(自身を含む): 34320780

約数和(自身を除く): 14520375

約数列:

[1, 3, 5, 9, 15, 45, 440009, 1320027, 2200045, 3960081, 6600135, 19800405]

約数ペア:

[(1, 19800405), (3, 6600135), (5, 3960081), (9, 2200045), (15, 1320027), (45, 440009)]