21139874

素因数分解:

$2^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{12689}}^1$

素因数の和:12722

約数の個数: 24

約数和(自身を含む): 39059820

約数和(自身を除く): 17919946

約数列:

[1, 2, 7, 14, 17, 34, 49, 98, 119, 238, 833, 1666, 12689, 25378, 88823, 177646, 215713, 431426, 621761, 1243522, 1509991, 3019982, 10569937, 21139874]

約数ペア:

[(1, 21139874), (2, 10569937), (7, 3019982), (14, 1509991), (17, 1243522), (34, 621761), (49, 431426), (98, 215713), (119, 177646), (238, 88823), (833, 25378), (1666, 12689)]