21088125

素因数分解:

$3^2\times 5^4\times {\mathrm{23}}^1\times {\mathrm{163}}^1$

素因数の和:212

約数の個数: 60

約数和(自身を含む): 39962208

約数和(自身を除く): 18874083

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 125, 163, 207, 225, 345, 375, 489, 575, 625, 815, 1035, 1125, 1467, 1725, 1875, 2445, 2875, 3749, 4075, 5175, 5625, 7335, 8625, 11247, 12225, 14375, 18745, 20375, 25875, 33741, 36675, 43125, 56235, 61125, 93725, 101875, 129375, 168705, 183375, 281175, 305625, 468625, 843525, 916875, 1405875, 2343125, 4217625, 7029375, 21088125]

約数ペア:

[(1, 21088125), (3, 7029375), (5, 4217625), (9, 2343125), (15, 1405875), (23, 916875), (25, 843525), (45, 468625), (69, 305625), (75, 281175), (115, 183375), (125, 168705), (163, 129375), (207, 101875), (225, 93725), (345, 61125), (375, 56235), (489, 43125), (575, 36675), (625, 33741), (815, 25875), (1035, 20375), (1125, 18745), (1467, 14375), (1725, 12225), (1875, 11247), (2445, 8625), (2875, 7335), (3749, 5625), (4075, 5175)]