21303387

素因数分解:

$3^2\times 7^3\times {\mathrm{67}}^1\times {\mathrm{103}}^1$

素因数の和:197

約数の個数: 48

約数和(自身を含む): 36774400

約数和(自身を除く): 15471013

約数列:

[1, 3, 7, 9, 21, 49, 63, 67, 103, 147, 201, 309, 343, 441, 469, 603, 721, 927, 1029, 1407, 2163, 3087, 3283, 4221, 5047, 6489, 6901, 9849, 15141, 20703, 22981, 29547, 35329, 45423, 48307, 62109, 68943, 105987, 144921, 206829, 317961, 338149, 434763, 1014447, 2367043, 3043341, 7101129, 21303387]

約数ペア:

[(1, 21303387), (3, 7101129), (7, 3043341), (9, 2367043), (21, 1014447), (49, 434763), (63, 338149), (67, 317961), (103, 206829), (147, 144921), (201, 105987), (309, 68943), (343, 62109), (441, 48307), (469, 45423), (603, 35329), (721, 29547), (927, 22981), (1029, 20703), (1407, 15141), (2163, 9849), (3087, 6901), (3283, 6489), (4221, 5047)]