21345591

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^2\times {\mathrm{149}}^1$

素因数の和:275

約数の個数: 24

約数和(自身を含む): 30920400

約数和(自身を除く): 9574809

約数列:

[1, 3, 17, 51, 53, 149, 159, 447, 901, 2533, 2703, 2809, 7599, 7897, 8427, 23691, 47753, 134249, 143259, 402747, 418541, 1255623, 7115197, 21345591]

約数ペア:

[(1, 21345591), (3, 7115197), (17, 1255623), (51, 418541), (53, 402747), (149, 143259), (159, 134249), (447, 47753), (901, 23691), (2533, 8427), (2703, 7897), (2809, 7599)]