21428600

素因数分解:

$2^3\times 5^2\times {\mathrm{307}}^1\times {\mathrm{349}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 50127000

約数和(自身を除く): 28698400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 307, 349, 614, 698, 1228, 1396, 1535, 1745, 2456, 2792, 3070, 3490, 6140, 6980, 7675, 8725, 12280, 13960, 15350, 17450, 30700, 34900, 61400, 69800, 107143, 214286, 428572, 535715, 857144, 1071430, 2142860, 2678575, 4285720, 5357150, 10714300, 21428600]

約数ペア:

[(1, 21428600), (2, 10714300), (4, 5357150), (5, 4285720), (8, 2678575), (10, 2142860), (20, 1071430), (25, 857144), (40, 535715), (50, 428572), (100, 214286), (200, 107143), (307, 69800), (349, 61400), (614, 34900), (698, 30700), (1228, 17450), (1396, 15350), (1535, 13960), (1745, 12280), (2456, 8725), (2792, 7675), (3070, 6980), (3490, 6140)]