21387444

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2917}}^1$

素因数の和:2984

約数の個数: 48

約数和(自身を含む): 54905088

約数和(自身を除く): 33517644

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 47, 52, 78, 94, 141, 156, 188, 282, 564, 611, 1222, 1833, 2444, 2917, 3666, 5834, 7332, 8751, 11668, 17502, 35004, 37921, 75842, 113763, 137099, 151684, 227526, 274198, 411297, 455052, 548396, 822594, 1645188, 1782287, 3564574, 5346861, 7129148, 10693722, 21387444]

約数ペア:

[(1, 21387444), (2, 10693722), (3, 7129148), (4, 5346861), (6, 3564574), (12, 1782287), (13, 1645188), (26, 822594), (39, 548396), (47, 455052), (52, 411297), (78, 274198), (94, 227526), (141, 151684), (156, 137099), (188, 113763), (282, 75842), (564, 37921), (611, 35004), (1222, 17502), (1833, 11668), (2444, 8751), (2917, 7332), (3666, 5834)]