81311564

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{491}}^1\times {\mathrm{2179}}^1$

素因数の和:2693

約数の個数: 24

約数和(自身を含む): 150158400

約数和(自身を除く): 68846836

約数列:

[1, 2, 4, 19, 38, 76, 491, 982, 1964, 2179, 4358, 8716, 9329, 18658, 37316, 41401, 82802, 165604, 1069889, 2139778, 4279556, 20327891, 40655782, 81311564]

約数ペア:

[(1, 81311564), (2, 40655782), (4, 20327891), (19, 4279556), (38, 2139778), (76, 1069889), (491, 165604), (982, 82802), (1964, 41401), (2179, 37316), (4358, 18658), (8716, 9329)]