20019400

素因数分解:

$2^3\times 5^2\times {\mathrm{199}}^1\times {\mathrm{503}}^1$

素因数の和:718

約数の個数: 48

約数和(自身を含む): 46872000

約数和(自身を除く): 26852600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 199, 200, 398, 503, 796, 995, 1006, 1592, 1990, 2012, 2515, 3980, 4024, 4975, 5030, 7960, 9950, 10060, 12575, 19900, 20120, 25150, 39800, 50300, 100097, 100600, 200194, 400388, 500485, 800776, 1000970, 2001940, 2502425, 4003880, 5004850, 10009700, 20019400]

約数ペア:

[(1, 20019400), (2, 10009700), (4, 5004850), (5, 4003880), (8, 2502425), (10, 2001940), (20, 1000970), (25, 800776), (40, 500485), (50, 400388), (100, 200194), (199, 100600), (200, 100097), (398, 50300), (503, 39800), (796, 25150), (995, 20120), (1006, 19900), (1592, 12575), (1990, 10060), (2012, 9950), (2515, 7960), (3980, 5030), (4024, 4975)]