20642500

素因数分解:

$2^2\times 5^4\times {\mathrm{23}}^1\times {\mathrm{359}}^1$

素因数の和:406

約数の個数: 60

約数和(自身を含む): 47234880

約数和(自身を除く): 26592380

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 92, 100, 115, 125, 230, 250, 359, 460, 500, 575, 625, 718, 1150, 1250, 1436, 1795, 2300, 2500, 2875, 3590, 5750, 7180, 8257, 8975, 11500, 14375, 16514, 17950, 28750, 33028, 35900, 41285, 44875, 57500, 82570, 89750, 165140, 179500, 206425, 224375, 412850, 448750, 825700, 897500, 1032125, 2064250, 4128500, 5160625, 10321250, 20642500]

約数ペア:

[(1, 20642500), (2, 10321250), (4, 5160625), (5, 4128500), (10, 2064250), (20, 1032125), (23, 897500), (25, 825700), (46, 448750), (50, 412850), (92, 224375), (100, 206425), (115, 179500), (125, 165140), (230, 89750), (250, 82570), (359, 57500), (460, 44875), (500, 41285), (575, 35900), (625, 33028), (718, 28750), (1150, 17950), (1250, 16514), (1436, 14375), (1795, 11500), (2300, 8975), (2500, 8257), (2875, 7180), (3590, 5750)]