21184173

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{137}}^1$

素因数の和:255

約数の個数: 40

約数和(自身を含む): 33663168

約数和(自身を除く): 12478995

約数列:

[1, 3, 9, 23, 27, 69, 81, 83, 137, 207, 249, 411, 621, 747, 1233, 1863, 1909, 2241, 3151, 3699, 5727, 6723, 9453, 11097, 11371, 17181, 28359, 34113, 51543, 85077, 102339, 154629, 255231, 261533, 307017, 784599, 921051, 2353797, 7061391, 21184173]

約数ペア:

[(1, 21184173), (3, 7061391), (9, 2353797), (23, 921051), (27, 784599), (69, 307017), (81, 261533), (83, 255231), (137, 154629), (207, 102339), (249, 85077), (411, 51543), (621, 34113), (747, 28359), (1233, 17181), (1863, 11371), (1909, 11097), (2241, 9453), (3151, 6723), (3699, 5727)]