20399337

素因数分解:

$3^3\times 7^2\times {\mathrm{17}}^1\times {\mathrm{907}}^1$

素因数の和:947

約数の個数: 48

約数和(自身を含む): 37264320

約数和(自身を除く): 16864983

約数列:

[1, 3, 7, 9, 17, 21, 27, 49, 51, 63, 119, 147, 153, 189, 357, 441, 459, 833, 907, 1071, 1323, 2499, 2721, 3213, 6349, 7497, 8163, 15419, 19047, 22491, 24489, 44443, 46257, 57141, 107933, 133329, 138771, 171423, 323799, 399987, 416313, 755531, 971397, 1199961, 2266593, 2914191, 6799779, 20399337]

約数ペア:

[(1, 20399337), (3, 6799779), (7, 2914191), (9, 2266593), (17, 1199961), (21, 971397), (27, 755531), (49, 416313), (51, 399987), (63, 323799), (119, 171423), (147, 138771), (153, 133329), (189, 107933), (357, 57141), (441, 46257), (459, 44443), (833, 24489), (907, 22491), (1071, 19047), (1323, 15419), (2499, 8163), (2721, 7497), (3213, 6349)]