31790889

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 51891840

約数和(自身を除く): 20100951

約数列:

[1, 3, 9, 13, 39, 43, 71, 89, 117, 129, 213, 267, 387, 559, 639, 801, 923, 1157, 1677, 2769, 3053, 3471, 3827, 5031, 6319, 8307, 9159, 10413, 11481, 18957, 27477, 34443, 39689, 49751, 56871, 82147, 119067, 149253, 246441, 271717, 357201, 447759, 739323, 815151, 2445453, 3532321, 10596963, 31790889]

約数ペア:

[(1, 31790889), (3, 10596963), (9, 3532321), (13, 2445453), (39, 815151), (43, 739323), (71, 447759), (89, 357201), (117, 271717), (129, 246441), (213, 149253), (267, 119067), (387, 82147), (559, 56871), (639, 49751), (801, 39689), (923, 34443), (1157, 27477), (1677, 18957), (2769, 11481), (3053, 10413), (3471, 9159), (3827, 8307), (5031, 6319)]