51781420

素因数分解:

$2^2\times 5^1\times {\mathrm{2589071}}^1$

素因数の和:2589080

約数の個数: 12

約数和(自身を含む): 108741024

約数和(自身を除く): 56959604

約数列:

[1, 2, 4, 5, 10, 20, 2589071, 5178142, 10356284, 12945355, 25890710, 51781420]

約数ペア:

[(1, 51781420), (2, 25890710), (4, 12945355), (5, 10356284), (10, 5178142), (20, 2589071)]