19702780

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{7757}}^1$

素因数の和:7893

約数の個数: 24

約数和(自身を含む): 41707008

約数和(自身を除く): 22004228

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 7757, 15514, 31028, 38785, 77570, 155140, 985139, 1970278, 3940556, 4925695, 9851390, 19702780]

約数ペア:

[(1, 19702780), (2, 9851390), (4, 4925695), (5, 3940556), (10, 1970278), (20, 985139), (127, 155140), (254, 77570), (508, 38785), (635, 31028), (1270, 15514), (2540, 7757)]