20980240

素因数分解:

$2^4\times 5^1\times {\mathrm{262253}}^1$

素因数の和:262266

約数の個数: 20

約数和(自身を含む): 48779244

約数和(自身を除く): 27799004

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262253, 524506, 1049012, 1311265, 2098024, 2622530, 4196048, 5245060, 10490120, 20980240]

約数ペア:

[(1, 20980240), (2, 10490120), (4, 5245060), (5, 4196048), (8, 2622530), (10, 2098024), (16, 1311265), (20, 1049012), (40, 524506), (80, 262253)]