19972840

素因数分解:

$2^3\times 5^1\times {\mathrm{499321}}^1$

素因数の和:499332

約数の個数: 16

約数和(自身を含む): 44938980

約数和(自身を除く): 24966140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499321, 998642, 1997284, 2496605, 3994568, 4993210, 9986420, 19972840]

約数ペア:

[(1, 19972840), (2, 9986420), (4, 4993210), (5, 3994568), (8, 2496605), (10, 1997284), (20, 998642), (40, 499321)]