21991150321

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{2243}}^1\times {\mathrm{22961}}^1$

素因数の和:25272

約数の個数: 16

約数和(自身を含む): 25557257088

約数和(自身を除く): 3566106767

約数列:

[1, 7, 61, 427, 2243, 15701, 22961, 136823, 160727, 957761, 1400621, 9804347, 51501523, 360510661, 3141592903, 21991150321]

約数ペア:

[(1, 21991150321), (7, 3141592903), (61, 360510661), (427, 51501523), (2243, 9804347), (15701, 1400621), (22961, 957761), (136823, 160727)]