20815000

素因数分解:

$2^3\times 5^4\times {\mathrm{23}}^1\times {\mathrm{181}}^1$

素因数の和:230

約数の個数: 80

約数和(自身を含む): 51171120

約数和(自身を除く): 30356120

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 25, 40, 46, 50, 92, 100, 115, 125, 181, 184, 200, 230, 250, 362, 460, 500, 575, 625, 724, 905, 920, 1000, 1150, 1250, 1448, 1810, 2300, 2500, 2875, 3620, 4163, 4525, 4600, 5000, 5750, 7240, 8326, 9050, 11500, 14375, 16652, 18100, 20815, 22625, 23000, 28750, 33304, 36200, 41630, 45250, 57500, 83260, 90500, 104075, 113125, 115000, 166520, 181000, 208150, 226250, 416300, 452500, 520375, 832600, 905000, 1040750, 2081500, 2601875, 4163000, 5203750, 10407500, 20815000]

約数ペア:

[(1, 20815000), (2, 10407500), (4, 5203750), (5, 4163000), (8, 2601875), (10, 2081500), (20, 1040750), (23, 905000), (25, 832600), (40, 520375), (46, 452500), (50, 416300), (92, 226250), (100, 208150), (115, 181000), (125, 166520), (181, 115000), (184, 113125), (200, 104075), (230, 90500), (250, 83260), (362, 57500), (460, 45250), (500, 41630), (575, 36200), (625, 33304), (724, 28750), (905, 23000), (920, 22625), (1000, 20815), (1150, 18100), (1250, 16652), (1448, 14375), (1810, 11500), (2300, 9050), (2500, 8326), (2875, 7240), (3620, 5750), (4163, 5000), (4525, 4600)]