21075257

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 6296263

約数列:

[1, 7, 17, 29, 31, 119, 197, 203, 217, 493, 527, 899, 1379, 3349, 3451, 3689, 5713, 6107, 6293, 15283, 23443, 39991, 42749, 97121, 103819, 106981, 177103, 679847, 726733, 1239721, 3010751, 21075257]

約数ペア:

[(1, 21075257), (7, 3010751), (17, 1239721), (29, 726733), (31, 679847), (119, 177103), (197, 106981), (203, 103819), (217, 97121), (493, 42749), (527, 39991), (899, 23443), (1379, 15283), (3349, 6293), (3451, 6107), (3689, 5713)]