21095225

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{499}}^1$

素因数の和:617

約数の個数: 24

約数和(自身を含む): 27900000

約数和(自身を除く): 6804775

約数列:

[1, 5, 19, 25, 89, 95, 445, 475, 499, 1691, 2225, 2495, 8455, 9481, 12475, 42275, 44411, 47405, 222055, 237025, 843809, 1110275, 4219045, 21095225]

約数ペア:

[(1, 21095225), (5, 4219045), (19, 1110275), (25, 843809), (89, 237025), (95, 222055), (445, 47405), (475, 44411), (499, 42275), (1691, 12475), (2225, 9481), (2495, 8455)]