21708323

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{643}}^1$

素因数の和:723

約数の個数: 24

約数和(自身を含む): 27751248

約数和(自身を除く): 6042925

約数列:

[1, 7, 13, 49, 53, 91, 371, 637, 643, 689, 2597, 4501, 4823, 8359, 31507, 33761, 34079, 58513, 238553, 409591, 443027, 1669871, 3101189, 21708323]

約数ペア:

[(1, 21708323), (7, 3101189), (13, 1669871), (49, 443027), (53, 409591), (91, 238553), (371, 58513), (637, 34079), (643, 33761), (689, 31507), (2597, 8359), (4501, 4823)]