21987931

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{3331}}^1$

素因数の和:3402

約数の個数: 16

約数和(自身を含む): 26869248

約数和(自身を除く): 4881317

約数列:

[1, 7, 23, 41, 161, 287, 943, 3331, 6601, 23317, 76613, 136571, 536291, 955997, 3141133, 21987931]

約数ペア:

[(1, 21987931), (7, 3141133), (23, 955997), (41, 536291), (161, 136571), (287, 76613), (943, 23317), (3331, 6601)]