51380240

素因数分解:

$2^4\times 5^1\times {\mathrm{642253}}^1$

素因数の和:642266

約数の個数: 20

約数和(自身を含む): 119459244

約数和(自身を除く): 68079004

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 642253, 1284506, 2569012, 3211265, 5138024, 6422530, 10276048, 12845060, 25690120, 51380240]

約数ペア:

[(1, 51380240), (2, 25690120), (4, 12845060), (5, 10276048), (8, 6422530), (10, 5138024), (16, 3211265), (20, 2569012), (40, 1284506), (80, 642253)]