19791280

素因数分解:

$2^4\times 5^1\times {\mathrm{247391}}^1$

素因数の和:247404

約数の個数: 20

約数和(自身を含む): 46014912

約数和(自身を除く): 26223632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247391, 494782, 989564, 1236955, 1979128, 2473910, 3958256, 4947820, 9895640, 19791280]

約数ペア:

[(1, 19791280), (2, 9895640), (4, 4947820), (5, 3958256), (8, 2473910), (10, 1979128), (16, 1236955), (20, 989564), (40, 494782), (80, 247391)]