19828520

素因数分解:

$2^3\times 5^1\times {\mathrm{495713}}^1$

素因数の和:495724

約数の個数: 16

約数和(自身を含む): 44614260

約数和(自身を除く): 24785740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 495713, 991426, 1982852, 2478565, 3965704, 4957130, 9914260, 19828520]

約数ペア:

[(1, 19828520), (2, 9914260), (4, 4957130), (5, 3965704), (8, 2478565), (10, 1982852), (20, 991426), (40, 495713)]