20494789

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 24919488

約数和(自身を除く): 4424699

約数列:

[1, 7, 43, 49, 71, 137, 301, 497, 959, 2107, 3053, 3479, 5891, 6713, 9727, 21371, 41237, 68089, 149597, 288659, 418261, 476623, 2927827, 20494789]

約数ペア:

[(1, 20494789), (7, 2927827), (43, 476623), (49, 418261), (71, 288659), (137, 149597), (301, 68089), (497, 41237), (959, 21371), (2107, 9727), (3053, 6713), (3479, 5891)]