21181288

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{419}}^1$

素因数の和:585

約数の個数: 32

約数和(自身を含む): 40824000

約数和(自身を除く): 19642712

約数列:

[1, 2, 4, 8, 71, 89, 142, 178, 284, 356, 419, 568, 712, 838, 1676, 3352, 6319, 12638, 25276, 29749, 37291, 50552, 59498, 74582, 118996, 149164, 237992, 298328, 2647661, 5295322, 10590644, 21181288]

約数ペア:

[(1, 21181288), (2, 10590644), (4, 5295322), (8, 2647661), (71, 298328), (89, 237992), (142, 149164), (178, 118996), (284, 74582), (356, 59498), (419, 50552), (568, 37291), (712, 29749), (838, 25276), (1676, 12638), (3352, 6319)]