21021675

素因数分解:

$3^1\times 5^2\times {\mathrm{127}}^1\times {\mathrm{2207}}^1$

素因数の和:2347

約数の個数: 24

約数和(自身を含む): 35045376

約数和(自身を除く): 14023701

約数列:

[1, 3, 5, 15, 25, 75, 127, 381, 635, 1905, 2207, 3175, 6621, 9525, 11035, 33105, 55175, 165525, 280289, 840867, 1401445, 4204335, 7007225, 21021675]

約数ペア:

[(1, 21021675), (3, 7007225), (5, 4204335), (15, 1401445), (25, 840867), (75, 280289), (127, 165525), (381, 55175), (635, 33105), (1905, 11035), (2207, 9525), (3175, 6621)]