21508487

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{21487}}^1$

素因数の和:21518

約数の個数: 16

約数和(自身を含む): 28879872

約数和(自身を除く): 7371385

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 21487, 150409, 236357, 279331, 1654499, 1955317, 3072641, 21508487]

約数ペア:

[(1, 21508487), (7, 3072641), (11, 1955317), (13, 1654499), (77, 279331), (91, 236357), (143, 150409), (1001, 21487)]