81657328

素因数分解:

$2^4\times {\mathrm{251}}^1\times {\mathrm{20333}}^1$

素因数の和:20592

約数の個数: 20

約数和(自身を含む): 158849208

約数和(自身を除く): 77191880

約数列:

[1, 2, 4, 8, 16, 251, 502, 1004, 2008, 4016, 20333, 40666, 81332, 162664, 325328, 5103583, 10207166, 20414332, 40828664, 81657328]

約数ペア:

[(1, 81657328), (2, 40828664), (4, 20414332), (8, 10207166), (16, 5103583), (251, 325328), (502, 162664), (1004, 81332), (2008, 40666), (4016, 20333)]