21808125

素因数分解:

$3^2\times 5^4\times {\mathrm{3877}}^1$

素因数の和:3903

約数の個数: 30

約数和(自身を含む): 39373334

約数和(自身を除く): 17565209

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375, 625, 1125, 1875, 3877, 5625, 11631, 19385, 34893, 58155, 96925, 174465, 290775, 484625, 872325, 1453875, 2423125, 4361625, 7269375, 21808125]

約数ペア:

[(1, 21808125), (3, 7269375), (5, 4361625), (9, 2423125), (15, 1453875), (25, 872325), (45, 484625), (75, 290775), (125, 174465), (225, 96925), (375, 58155), (625, 34893), (1125, 19385), (1875, 11631), (3877, 5625)]