18520875

素因数分解:

$3^2\times 5^3\times {\mathrm{101}}^1\times {\mathrm{163}}^1$

素因数の和:285

約数の個数: 48

約数和(自身を含む): 33924384

約数和(自身を除く): 15403509

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 101, 125, 163, 225, 303, 375, 489, 505, 815, 909, 1125, 1467, 1515, 2445, 2525, 4075, 4545, 7335, 7575, 12225, 12625, 16463, 20375, 22725, 36675, 37875, 49389, 61125, 82315, 113625, 148167, 183375, 246945, 411575, 740835, 1234725, 2057875, 3704175, 6173625, 18520875]

約数ペア:

[(1, 18520875), (3, 6173625), (5, 3704175), (9, 2057875), (15, 1234725), (25, 740835), (45, 411575), (75, 246945), (101, 183375), (125, 148167), (163, 113625), (225, 82315), (303, 61125), (375, 49389), (489, 37875), (505, 36675), (815, 22725), (909, 20375), (1125, 16463), (1467, 12625), (1515, 12225), (2445, 7575), (2525, 7335), (4075, 4545)]