21031738

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1583}}^1$

素因数の和:1678

約数の個数: 32

約数和(自身を含む): 39384576

約数和(自身を除く): 18352838

約数列:

[1, 2, 7, 13, 14, 26, 73, 91, 146, 182, 511, 949, 1022, 1583, 1898, 3166, 6643, 11081, 13286, 20579, 22162, 41158, 115559, 144053, 231118, 288106, 808913, 1502267, 1617826, 3004534, 10515869, 21031738]

約数ペア:

[(1, 21031738), (2, 10515869), (7, 3004534), (13, 1617826), (14, 1502267), (26, 808913), (73, 288106), (91, 231118), (146, 144053), (182, 115559), (511, 41158), (949, 22162), (1022, 20579), (1583, 13286), (1898, 11081), (3166, 6643)]