19947141

素因数分解:

$3^5\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 32288256

約数和(自身を除く): 12341115

約数列:

[1, 3, 9, 23, 27, 43, 69, 81, 83, 129, 207, 243, 249, 387, 621, 747, 989, 1161, 1863, 1909, 2241, 2967, 3483, 3569, 5589, 5727, 6723, 8901, 10449, 10707, 17181, 20169, 26703, 32121, 51543, 80109, 82087, 96363, 154629, 240327, 246261, 289089, 463887, 738783, 867267, 2216349, 6649047, 19947141]

約数ペア:

[(1, 19947141), (3, 6649047), (9, 2216349), (23, 867267), (27, 738783), (43, 463887), (69, 289089), (81, 246261), (83, 240327), (129, 154629), (207, 96363), (243, 82087), (249, 80109), (387, 51543), (621, 32121), (747, 26703), (989, 20169), (1161, 17181), (1863, 10707), (1909, 10449), (2241, 8901), (2967, 6723), (3483, 5727), (3569, 5589)]