18931653

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 31135104

約数和(自身を除く): 12203451

約数列:

[1, 3, 9, 13, 39, 43, 53, 71, 117, 129, 159, 213, 387, 477, 559, 639, 689, 923, 1677, 2067, 2279, 2769, 3053, 3763, 5031, 6201, 6837, 8307, 9159, 11289, 20511, 27477, 29627, 33867, 39689, 48919, 88881, 119067, 146757, 161809, 266643, 357201, 440271, 485427, 1456281, 2103517, 6310551, 18931653]

約数ペア:

[(1, 18931653), (3, 6310551), (9, 2103517), (13, 1456281), (39, 485427), (43, 440271), (53, 357201), (71, 266643), (117, 161809), (129, 146757), (159, 119067), (213, 88881), (387, 48919), (477, 39689), (559, 33867), (639, 29627), (689, 27477), (923, 20511), (1677, 11289), (2067, 9159), (2279, 8307), (2769, 6837), (3053, 6201), (3763, 5031)]