20091040

素因数分解:

$2^5\times 5^1\times {\mathrm{199}}^1\times {\mathrm{631}}^1$

素因数の和:845

約数の個数: 48

約数和(自身を含む): 47779200

約数和(自身を除く): 27688160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 199, 398, 631, 796, 995, 1262, 1592, 1990, 2524, 3155, 3184, 3980, 5048, 6310, 6368, 7960, 10096, 12620, 15920, 20192, 25240, 31840, 50480, 100960, 125569, 251138, 502276, 627845, 1004552, 1255690, 2009104, 2511380, 4018208, 5022760, 10045520, 20091040]

約数ペア:

[(1, 20091040), (2, 10045520), (4, 5022760), (5, 4018208), (8, 2511380), (10, 2009104), (16, 1255690), (20, 1004552), (32, 627845), (40, 502276), (80, 251138), (160, 125569), (199, 100960), (398, 50480), (631, 31840), (796, 25240), (995, 20192), (1262, 15920), (1592, 12620), (1990, 10096), (2524, 7960), (3155, 6368), (3184, 6310), (3980, 5048)]