28781168

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{138371}}^1$

素因数の和:138392

約数の個数: 20

約数和(自身を含む): 60053448

約数和(自身を除く): 31272280

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 138371, 276742, 553484, 1106968, 1798823, 2213936, 3597646, 7195292, 14390584, 28781168]

約数ペア:

[(1, 28781168), (2, 14390584), (4, 7195292), (8, 3597646), (13, 2213936), (16, 1798823), (26, 1106968), (52, 553484), (104, 276742), (208, 138371)]