129975280

素因数分解:

$2^4\times 5^1\times {\mathrm{1624691}}^1$

素因数の和:1624704

約数の個数: 20

約数和(自身を含む): 302192712

約数和(自身を除く): 172217432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1624691, 3249382, 6498764, 8123455, 12997528, 16246910, 25995056, 32493820, 64987640, 129975280]

約数ペア:

[(1, 129975280), (2, 64987640), (4, 32493820), (5, 25995056), (8, 16246910), (10, 12997528), (16, 8123455), (20, 6498764), (40, 3249382), (80, 1624691)]