20480121

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:275

約数の個数: 40

約数和(自身を含む): 32931360

約数和(自身を除く): 12451239

約数列:

[1, 3, 9, 17, 27, 51, 81, 107, 139, 153, 321, 417, 459, 963, 1251, 1377, 1819, 2363, 2889, 3753, 5457, 7089, 8667, 11259, 14873, 16371, 21267, 44619, 49113, 63801, 133857, 147339, 191403, 252841, 401571, 758523, 1204713, 2275569, 6826707, 20480121]

約数ペア:

[(1, 20480121), (3, 6826707), (9, 2275569), (17, 1204713), (27, 758523), (51, 401571), (81, 252841), (107, 191403), (139, 147339), (153, 133857), (321, 63801), (417, 49113), (459, 44619), (963, 21267), (1251, 16371), (1377, 14873), (1819, 11259), (2363, 8667), (2889, 7089), (3753, 5457)]