19989080

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1187}}^1$

素因数の和:1619

約数の個数: 32

約数和(自身を含む): 45120240

約数和(自身を除く): 25131160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1187, 1684, 2105, 2374, 3368, 4210, 4748, 5935, 8420, 9496, 11870, 16840, 23740, 47480, 499727, 999454, 1998908, 2498635, 3997816, 4997270, 9994540, 19989080]

約数ペア:

[(1, 19989080), (2, 9994540), (4, 4997270), (5, 3997816), (8, 2498635), (10, 1998908), (20, 999454), (40, 499727), (421, 47480), (842, 23740), (1187, 16840), (1684, 11870), (2105, 9496), (2374, 8420), (3368, 5935), (4210, 4748)]