20521599

素因数分解:

$3^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{5399}}^1$

素因数の和:5590

約数の個数: 16

約数和(自身を含む): 31449600

約数和(自身を除く): 10928001

約数列:

[1, 3, 7, 21, 181, 543, 1267, 3801, 5399, 16197, 37793, 113379, 977219, 2931657, 6840533, 20521599]

約数ペア:

[(1, 20521599), (3, 6840533), (7, 2931657), (21, 977219), (181, 113379), (543, 37793), (1267, 16197), (3801, 5399)]