20973375

素因数分解:

$3^2\times 5^3\times {\mathrm{103}}^1\times {\mathrm{181}}^1$

素因数の和:305

約数の個数: 48

約数和(自身を含む): 38385984

約数和(自身を除く): 17412609

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 103, 125, 181, 225, 309, 375, 515, 543, 905, 927, 1125, 1545, 1629, 2575, 2715, 4525, 4635, 7725, 8145, 12875, 13575, 18643, 22625, 23175, 38625, 40725, 55929, 67875, 93215, 115875, 167787, 203625, 279645, 466075, 838935, 1398225, 2330375, 4194675, 6991125, 20973375]

約数ペア:

[(1, 20973375), (3, 6991125), (5, 4194675), (9, 2330375), (15, 1398225), (25, 838935), (45, 466075), (75, 279645), (103, 203625), (125, 167787), (181, 115875), (225, 93215), (309, 67875), (375, 55929), (515, 40725), (543, 38625), (905, 23175), (927, 22625), (1125, 18643), (1545, 13575), (1629, 12875), (2575, 8145), (2715, 7725), (4525, 4635)]