399202480

素因数分解:

$2^4\times 5^1\times {\mathrm{4990031}}^1$

素因数の和:4990044

約数の個数: 20

約数和(自身を含む): 928145952

約数和(自身を除く): 528943472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4990031, 9980062, 19960124, 24950155, 39920248, 49900310, 79840496, 99800620, 199601240, 399202480]

約数ペア:

[(1, 399202480), (2, 199601240), (4, 99800620), (5, 79840496), (8, 49900310), (10, 39920248), (16, 24950155), (20, 19960124), (40, 9980062), (80, 4990031)]