71378680

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{4363}}^1$

素因数の和:4783

約数の個数: 32

約数和(自身を含む): 161031600

約数和(自身を除く): 89652920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 2045, 3272, 4090, 4363, 8180, 8726, 16360, 17452, 21815, 34904, 43630, 87260, 174520, 1784467, 3568934, 7137868, 8922335, 14275736, 17844670, 35689340, 71378680]

約数ペア:

[(1, 71378680), (2, 35689340), (4, 17844670), (5, 14275736), (8, 8922335), (10, 7137868), (20, 3568934), (40, 1784467), (409, 174520), (818, 87260), (1636, 43630), (2045, 34904), (3272, 21815), (4090, 17452), (4363, 16360), (8180, 8726)]