21367507

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1\times {\mathrm{307}}^1$

素因数の和:538

約数の個数: 16

約数和(自身を含む): 25053952

約数和(自身を除く): 3686445

約数列:

[1, 7, 61, 163, 307, 427, 1141, 2149, 9943, 18727, 50041, 69601, 131089, 350287, 3052501, 21367507]

約数ペア:

[(1, 21367507), (7, 3052501), (61, 350287), (163, 131089), (307, 69601), (427, 50041), (1141, 18727), (2149, 9943)]