21212968

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{19937}}^1$

素因数の和:19969

約数の個数: 32

約数和(自身を含む): 47851200

約数和(自身を除く): 26638232

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 133, 152, 266, 532, 1064, 19937, 39874, 79748, 139559, 159496, 279118, 378803, 558236, 757606, 1116472, 1515212, 2651621, 3030424, 5303242, 10606484, 21212968]

約数ペア:

[(1, 21212968), (2, 10606484), (4, 5303242), (7, 3030424), (8, 2651621), (14, 1515212), (19, 1116472), (28, 757606), (38, 558236), (56, 378803), (76, 279118), (133, 159496), (152, 139559), (266, 79748), (532, 39874), (1064, 19937)]