20423151

素因数分解:

$3^3\times 7^2\times {\mathrm{43}}^1\times {\mathrm{359}}^1$

素因数の和:425

約数の個数: 48

約数和(自身を含む): 36115200

約数和(自身を除く): 15692049

約数列:

[1, 3, 7, 9, 21, 27, 43, 49, 63, 129, 147, 189, 301, 359, 387, 441, 903, 1077, 1161, 1323, 2107, 2513, 2709, 3231, 6321, 7539, 8127, 9693, 15437, 17591, 18963, 22617, 46311, 52773, 56889, 67851, 108059, 138933, 158319, 324177, 416799, 474957, 756413, 972531, 2269239, 2917593, 6807717, 20423151]

約数ペア:

[(1, 20423151), (3, 6807717), (7, 2917593), (9, 2269239), (21, 972531), (27, 756413), (43, 474957), (49, 416799), (63, 324177), (129, 158319), (147, 138933), (189, 108059), (301, 67851), (359, 56889), (387, 52773), (441, 46311), (903, 22617), (1077, 18963), (1161, 17591), (1323, 15437), (2107, 9693), (2513, 8127), (2709, 7539), (3231, 6321)]