20766861

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:263

約数の個数: 40

約数和(自身を含む): 33035904

約数和(自身を除く): 12269043

約数列:

[1, 3, 9, 23, 27, 69, 71, 81, 157, 207, 213, 471, 621, 639, 1413, 1633, 1863, 1917, 3611, 4239, 4899, 5751, 10833, 11147, 12717, 14697, 32499, 33441, 44091, 97497, 100323, 132273, 256381, 292491, 300969, 769143, 902907, 2307429, 6922287, 20766861]

約数ペア:

[(1, 20766861), (3, 6922287), (9, 2307429), (23, 902907), (27, 769143), (69, 300969), (71, 292491), (81, 256381), (157, 132273), (207, 100323), (213, 97497), (471, 44091), (621, 33441), (639, 32499), (1413, 14697), (1633, 12717), (1863, 11147), (1917, 10833), (3611, 5751), (4239, 4899)]