21578288

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{20129}}^1$

素因数の和:20204

約数の個数: 20

約数和(自身を含む): 42434040

約数和(自身を除く): 20855752

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 20129, 40258, 80516, 161032, 322064, 1348643, 2697286, 5394572, 10789144, 21578288]

約数ペア:

[(1, 21578288), (2, 10789144), (4, 5394572), (8, 2697286), (16, 1348643), (67, 322064), (134, 161032), (268, 80516), (536, 40258), (1072, 20129)]