21138621

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1709}}^1$

素因数の和:1769

約数の個数: 32

約数和(自身を含む): 35020800

約数和(自身を除く): 13882179

約数列:

[1, 3, 7, 19, 21, 31, 57, 93, 133, 217, 399, 589, 651, 1709, 1767, 4123, 5127, 11963, 12369, 32471, 35889, 52979, 97413, 158937, 227297, 370853, 681891, 1006601, 1112559, 3019803, 7046207, 21138621]

約数ペア:

[(1, 21138621), (3, 7046207), (7, 3019803), (19, 1112559), (21, 1006601), (31, 681891), (57, 370853), (93, 227297), (133, 158937), (217, 97413), (399, 52979), (589, 35889), (651, 32471), (1709, 12369), (1767, 11963), (4123, 5127)]