20871212

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{2549}}^1$

素因数の和:2665

約数の個数: 24

約数和(自身を含む): 38556000

約数和(自身を除く): 17684788

約数列:

[1, 2, 4, 23, 46, 89, 92, 178, 356, 2047, 2549, 4094, 5098, 8188, 10196, 58627, 117254, 226861, 234508, 453722, 907444, 5217803, 10435606, 20871212]

約数ペア:

[(1, 20871212), (2, 10435606), (4, 5217803), (23, 907444), (46, 453722), (89, 234508), (92, 226861), (178, 117254), (356, 58627), (2047, 10196), (2549, 8188), (4094, 5098)]