18421875

素因数分解:

$3^2\times 5^6\times {\mathrm{131}}^1$

素因数の和:167

約数の個数: 42

約数和(自身を含む): 33515196

約数和(自身を除く): 15093321

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 131, 225, 375, 393, 625, 655, 1125, 1179, 1875, 1965, 3125, 3275, 5625, 5895, 9375, 9825, 15625, 16375, 28125, 29475, 46875, 49125, 81875, 140625, 147375, 245625, 409375, 736875, 1228125, 2046875, 3684375, 6140625, 18421875]

約数ペア:

[(1, 18421875), (3, 6140625), (5, 3684375), (9, 2046875), (15, 1228125), (25, 736875), (45, 409375), (75, 245625), (125, 147375), (131, 140625), (225, 81875), (375, 49125), (393, 46875), (625, 29475), (655, 28125), (1125, 16375), (1179, 15625), (1875, 9825), (1965, 9375), (3125, 5895), (3275, 5625)]