20930450

素因数分解:

$2^1\times 5^2\times {\mathrm{647}}^2$

素因数の和:1306

約数の個数: 18

約数和(自身を含む): 38990901

約数和(自身を除く): 18060451

約数列:

[1, 2, 5, 10, 25, 50, 647, 1294, 3235, 6470, 16175, 32350, 418609, 837218, 2093045, 4186090, 10465225, 20930450]

約数ペア:

[(1, 20930450), (2, 10465225), (5, 4186090), (10, 2093045), (25, 837218), (50, 418609), (647, 32350), (1294, 16175), (3235, 6470)]