21256875

素因数分解:

$3^2\times 5^4\times {\mathrm{3779}}^1$

素因数の和:3805

約数の個数: 30

約数和(自身を含む): 38378340

約数和(自身を除く): 17121465

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375, 625, 1125, 1875, 3779, 5625, 11337, 18895, 34011, 56685, 94475, 170055, 283425, 472375, 850275, 1417125, 2361875, 4251375, 7085625, 21256875]

約数ペア:

[(1, 21256875), (3, 7085625), (5, 4251375), (9, 2361875), (15, 1417125), (25, 850275), (45, 472375), (75, 283425), (125, 170055), (225, 94475), (375, 56685), (625, 34011), (1125, 18895), (1875, 11337), (3779, 5625)]