21378826

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{2089}}^1$

素因数の和:2158

約数の個数: 32

約数和(自身を含む): 39726720

約数和(自身を除く): 18347894

約数列:

[1, 2, 7, 14, 17, 34, 43, 86, 119, 238, 301, 602, 731, 1462, 2089, 4178, 5117, 10234, 14623, 29246, 35513, 71026, 89827, 179654, 248591, 497182, 628789, 1257578, 1527059, 3054118, 10689413, 21378826]

約数ペア:

[(1, 21378826), (2, 10689413), (7, 3054118), (14, 1527059), (17, 1257578), (34, 628789), (43, 497182), (86, 248591), (119, 179654), (238, 89827), (301, 71026), (602, 35513), (731, 29246), (1462, 14623), (2089, 10234), (4178, 5117)]