20168900

素因数分解:

$2^2\times 5^2\times {\mathrm{139}}^1\times {\mathrm{1451}}^1$

素因数の和:1604

約数の個数: 36

約数和(自身を含む): 44111760

約数和(自身を除く): 23942860

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 139, 278, 556, 695, 1390, 1451, 2780, 2902, 3475, 5804, 6950, 7255, 13900, 14510, 29020, 36275, 72550, 145100, 201689, 403378, 806756, 1008445, 2016890, 4033780, 5042225, 10084450, 20168900]

約数ペア:

[(1, 20168900), (2, 10084450), (4, 5042225), (5, 4033780), (10, 2016890), (20, 1008445), (25, 806756), (50, 403378), (100, 201689), (139, 145100), (278, 72550), (556, 36275), (695, 29020), (1390, 14510), (1451, 13900), (2780, 7255), (2902, 6950), (3475, 5804)]