21508513

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^2$

素因数の和:169

約数の個数: 24

約数和(自身を含む): 25652480

約数和(自身を除く): 4143967

約数列:

[1, 13, 19, 31, 53, 247, 403, 589, 689, 1007, 1643, 2809, 7657, 13091, 21359, 31217, 36517, 53371, 87079, 405821, 693823, 1132027, 1654501, 21508513]

約数ペア:

[(1, 21508513), (13, 1654501), (19, 1132027), (31, 693823), (53, 405821), (247, 87079), (403, 53371), (589, 36517), (689, 31217), (1007, 21359), (1643, 13091), (2809, 7657)]