209989720

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{19961}}^1$

素因数の和:20235

約数の個数: 32

約数和(自身を含む): 474297120

約数和(自身を除く): 264307400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 2104, 2630, 5260, 10520, 19961, 39922, 79844, 99805, 159688, 199610, 399220, 798440, 5249743, 10499486, 20998972, 26248715, 41997944, 52497430, 104994860, 209989720]

約数ペア:

[(1, 209989720), (2, 104994860), (4, 52497430), (5, 41997944), (8, 26248715), (10, 20998972), (20, 10499486), (40, 5249743), (263, 798440), (526, 399220), (1052, 199610), (1315, 159688), (2104, 99805), (2630, 79844), (5260, 39922), (10520, 19961)]