28408940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{202921}}^1$

素因数の和:202937

約数の個数: 24

約数和(自身を含む): 68181792

約数和(自身を除く): 39772852

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 202921, 405842, 811684, 1014605, 1420447, 2029210, 2840894, 4058420, 5681788, 7102235, 14204470, 28408940]

約数ペア:

[(1, 28408940), (2, 14204470), (4, 7102235), (5, 5681788), (7, 4058420), (10, 2840894), (14, 2029210), (20, 1420447), (28, 1014605), (35, 811684), (70, 405842), (140, 202921)]