19938425

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1979}}^1$

素因数の和:2033

約数の個数: 24

約数和(自身を含む): 27498240

約数和(自身を除く): 7559815

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 1979, 2015, 9895, 10075, 25727, 49475, 61349, 128635, 306745, 643175, 797537, 1533725, 3987685, 19938425]

約数ペア:

[(1, 19938425), (5, 3987685), (13, 1533725), (25, 797537), (31, 643175), (65, 306745), (155, 128635), (325, 61349), (403, 49475), (775, 25727), (1979, 10075), (2015, 9895)]