21099141

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 36391680

約数和(自身を除く): 15292539

約数列:

[1, 3, 7, 9, 21, 53, 63, 71, 89, 159, 213, 267, 371, 477, 497, 623, 639, 801, 1113, 1491, 1869, 3339, 3763, 4473, 4717, 5607, 6319, 11289, 14151, 18957, 26341, 33019, 33867, 42453, 44233, 56871, 79023, 99057, 132699, 237069, 297171, 334907, 398097, 1004721, 2344349, 3014163, 7033047, 21099141]

約数ペア:

[(1, 21099141), (3, 7033047), (7, 3014163), (9, 2344349), (21, 1004721), (53, 398097), (63, 334907), (71, 297171), (89, 237069), (159, 132699), (213, 99057), (267, 79023), (371, 56871), (477, 44233), (497, 42453), (623, 33867), (639, 33019), (801, 26341), (1113, 18957), (1491, 14151), (1869, 11289), (3339, 6319), (3763, 5607), (4473, 4717)]