2045720

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:467

約数の個数: 32

約数和(自身を含む): 4644000

約数和(自身を除く): 2598280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 257, 398, 514, 796, 995, 1028, 1285, 1592, 1990, 2056, 2570, 3980, 5140, 7960, 10280, 51143, 102286, 204572, 255715, 409144, 511430, 1022860, 2045720]

約数ペア:

[(1, 2045720), (2, 1022860), (4, 511430), (5, 409144), (8, 255715), (10, 204572), (20, 102286), (40, 51143), (199, 10280), (257, 7960), (398, 5140), (514, 3980), (796, 2570), (995, 2056), (1028, 1990), (1285, 1592)]