81721744

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{392893}}^1$

素因数の和:392914

約数の個数: 20

約数和(自身を含む): 170515996

約数和(自身を除く): 88794252

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 392893, 785786, 1571572, 3143144, 5107609, 6286288, 10215218, 20430436, 40860872, 81721744]

約数ペア:

[(1, 81721744), (2, 40860872), (4, 20430436), (8, 10215218), (13, 6286288), (16, 5107609), (26, 3143144), (52, 1571572), (104, 785786), (208, 392893)]