129752720

素因数分解:

$2^4\times 5^1\times {\mathrm{1621909}}^1$

素因数の和:1621922

約数の個数: 20

約数和(自身を含む): 301675260

約数和(自身を除く): 171922540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1621909, 3243818, 6487636, 8109545, 12975272, 16219090, 25950544, 32438180, 64876360, 129752720]

約数ペア:

[(1, 129752720), (2, 64876360), (4, 32438180), (5, 25950544), (8, 16219090), (10, 12975272), (16, 8109545), (20, 6487636), (40, 3243818), (80, 1621909)]