20491875

素因数分解:

$3^2\times 5^4\times {\mathrm{3643}}^1$

素因数の和:3669

約数の個数: 30

約数和(自身を含む): 36997532

約数和(自身を除く): 16505657

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375, 625, 1125, 1875, 3643, 5625, 10929, 18215, 32787, 54645, 91075, 163935, 273225, 455375, 819675, 1366125, 2276875, 4098375, 6830625, 20491875]

約数ペア:

[(1, 20491875), (3, 6830625), (5, 4098375), (9, 2276875), (15, 1366125), (25, 819675), (45, 455375), (75, 273225), (125, 163935), (225, 91075), (375, 54645), (625, 32787), (1125, 18215), (1875, 10929), (3643, 5625)]