638396

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{1319}}^1$

素因数の和:1345

約数の個数: 18

約数和(自身を含む): 1228920

約数和(自身を除く): 590524

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 1319, 2638, 5276, 14509, 29018, 58036, 159599, 319198, 638396]

約数ペア:

[(1, 638396), (2, 319198), (4, 159599), (11, 58036), (22, 29018), (44, 14509), (121, 5276), (242, 2638), (484, 1319)]