19965560

素因数分解:

$2^3\times 5^1\times {\mathrm{499139}}^1$

素因数の和:499150

約数の個数: 16

約数和(自身を含む): 44922600

約数和(自身を除く): 24957040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499139, 998278, 1996556, 2495695, 3993112, 4991390, 9982780, 19965560]

約数ペア:

[(1, 19965560), (2, 9982780), (4, 4991390), (5, 3993112), (8, 2495695), (10, 1996556), (20, 998278), (40, 499139)]