80987480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{289241}}^1$

素因数の和:289259

約数の個数: 32

約数和(自身を含む): 208254240

約数和(自身を除く): 127266760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 289241, 578482, 1156964, 1446205, 2024687, 2313928, 2892410, 4049374, 5784820, 8098748, 10123435, 11569640, 16197496, 20246870, 40493740, 80987480]

約数ペア:

[(1, 80987480), (2, 40493740), (4, 20246870), (5, 16197496), (7, 11569640), (8, 10123435), (10, 8098748), (14, 5784820), (20, 4049374), (28, 2892410), (35, 2313928), (40, 2024687), (56, 1446205), (70, 1156964), (140, 578482), (280, 289241)]