19887275

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{383}}^1$

素因数の和:491

約数の個数: 24

約数和(自身を含む): 25903104

約数和(自身を除く): 6015829

約数列:

[1, 5, 25, 31, 67, 155, 335, 383, 775, 1675, 1915, 2077, 9575, 10385, 11873, 25661, 51925, 59365, 128305, 296825, 641525, 795491, 3977455, 19887275]

約数ペア:

[(1, 19887275), (5, 3977455), (25, 795491), (31, 641525), (67, 296825), (155, 128305), (335, 59365), (383, 51925), (775, 25661), (1675, 11873), (1915, 10385), (2077, 9575)]