12721425

素因数分解:

$3^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{2389}}^1$

素因数の和:2473

約数の個数: 24

約数和(自身を含む): 21337920

約数和(自身を除く): 8616495

約数列:

[1, 3, 5, 15, 25, 71, 75, 213, 355, 1065, 1775, 2389, 5325, 7167, 11945, 35835, 59725, 169619, 179175, 508857, 848095, 2544285, 4240475, 12721425]

約数ペア:

[(1, 12721425), (3, 4240475), (5, 2544285), (15, 848095), (25, 508857), (71, 179175), (75, 169619), (213, 59725), (355, 35835), (1065, 11945), (1775, 7167), (2389, 5325)]