19902280

素因数分解:

$2^3\times 5^1\times {\mathrm{497557}}^1$

素因数の和:497568

約数の個数: 16

約数和(自身を含む): 44780220

約数和(自身を除く): 24877940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497557, 995114, 1990228, 2487785, 3980456, 4975570, 9951140, 19902280]

約数ペア:

[(1, 19902280), (2, 9951140), (4, 4975570), (5, 3980456), (8, 2487785), (10, 1990228), (20, 995114), (40, 497557)]