20818480

素因数分解:

$2^4\times 5^1\times {\mathrm{260231}}^1$

素因数の和:260244

約数の個数: 20

約数和(自身を含む): 48403152

約数和(自身を除く): 27584672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260231, 520462, 1040924, 1301155, 2081848, 2602310, 4163696, 5204620, 10409240, 20818480]

約数ペア:

[(1, 20818480), (2, 10409240), (4, 5204620), (5, 4163696), (8, 2602310), (10, 2081848), (16, 1301155), (20, 1040924), (40, 520462), (80, 260231)]