20571867

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{211}}^1$

素因数の和:400

約数の個数: 32

約数和(自身を含む): 32156160

約数和(自身を除く): 11584293

約数列:

[1, 3, 9, 23, 27, 69, 157, 207, 211, 471, 621, 633, 1413, 1899, 3611, 4239, 4853, 5697, 10833, 14559, 32499, 33127, 43677, 97497, 99381, 131031, 298143, 761921, 894429, 2285763, 6857289, 20571867]

約数ペア:

[(1, 20571867), (3, 6857289), (9, 2285763), (23, 894429), (27, 761921), (69, 298143), (157, 131031), (207, 99381), (211, 97497), (471, 43677), (621, 33127), (633, 32499), (1413, 14559), (1899, 10833), (3611, 5697), (4239, 4853)]