1997960

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{251}}^1$

素因数の和:461

約数の個数: 32

約数和(自身を含む): 4536000

約数和(自身を除く): 2538040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 251, 398, 502, 796, 995, 1004, 1255, 1592, 1990, 2008, 2510, 3980, 5020, 7960, 10040, 49949, 99898, 199796, 249745, 399592, 499490, 998980, 1997960]

約数ペア:

[(1, 1997960), (2, 998980), (4, 499490), (5, 399592), (8, 249745), (10, 199796), (20, 99898), (40, 49949), (199, 10040), (251, 7960), (398, 5020), (502, 3980), (796, 2510), (995, 2008), (1004, 1990), (1255, 1592)]