18538125

素因数分解:

$3^1\times 5^4\times {\mathrm{9887}}^1$

素因数の和:9910

約数の個数: 20

約数和(自身を含む): 30890112

約数和(自身を除く): 12351987

約数列:

[1, 3, 5, 15, 25, 75, 125, 375, 625, 1875, 9887, 29661, 49435, 148305, 247175, 741525, 1235875, 3707625, 6179375, 18538125]

約数ペア:

[(1, 18538125), (3, 6179375), (5, 3707625), (15, 1235875), (25, 741525), (75, 247175), (125, 148305), (375, 49435), (625, 29661), (1875, 9887)]