81990236

素因数分解:

$2^2\times {\mathrm{109}}^1\times {\mathrm{173}}^1\times {\mathrm{1087}}^1$

素因数の和:1373

約数の個数: 24

約数和(自身を含む): 145770240

約数和(自身を除く): 63780004

約数列:

[1, 2, 4, 109, 173, 218, 346, 436, 692, 1087, 2174, 4348, 18857, 37714, 75428, 118483, 188051, 236966, 376102, 473932, 752204, 20497559, 40995118, 81990236]

約数ペア:

[(1, 81990236), (2, 40995118), (4, 20497559), (109, 752204), (173, 473932), (218, 376102), (346, 236966), (436, 188051), (692, 118483), (1087, 75428), (2174, 37714), (4348, 18857)]