19821425

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{859}}^1$

素因数の和:953

約数の個数: 24

約数和(自身を含む): 26873280

約数和(自身を除く): 7051855

約数列:

[1, 5, 13, 25, 65, 71, 325, 355, 859, 923, 1775, 4295, 4615, 11167, 21475, 23075, 55835, 60989, 279175, 304945, 792857, 1524725, 3964285, 19821425]

約数ペア:

[(1, 19821425), (5, 3964285), (13, 1524725), (25, 792857), (65, 304945), (71, 279175), (325, 60989), (355, 55835), (859, 23075), (923, 21475), (1775, 11167), (4295, 4615)]