19890440

素因数分解:

$2^3\times 5^1\times {\mathrm{497261}}^1$

素因数の和:497272

約数の個数: 16

約数和(自身を含む): 44753580

約数和(自身を除く): 24863140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497261, 994522, 1989044, 2486305, 3978088, 4972610, 9945220, 19890440]

約数ペア:

[(1, 19890440), (2, 9945220), (4, 4972610), (5, 3978088), (8, 2486305), (10, 1989044), (20, 994522), (40, 497261)]