21308511

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{281}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 34219008

約数和(自身を除く): 12910497

約数列:

[1, 3, 7, 21, 23, 69, 157, 161, 281, 471, 483, 843, 1099, 1967, 3297, 3611, 5901, 6463, 10833, 19389, 25277, 44117, 45241, 75831, 132351, 135723, 308819, 926457, 1014691, 3044073, 7102837, 21308511]

約数ペア:

[(1, 21308511), (3, 7102837), (7, 3044073), (21, 1014691), (23, 926457), (69, 308819), (157, 135723), (161, 132351), (281, 75831), (471, 45241), (483, 44117), (843, 25277), (1099, 19389), (1967, 10833), (3297, 6463), (3611, 5901)]