21491519

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{313}}^1\times {\mathrm{577}}^1$

素因数の和:914

約数の個数: 16

約数和(自身を含む): 26134848

約数和(自身を除く): 4643329

約数列:

[1, 7, 17, 119, 313, 577, 2191, 4039, 5321, 9809, 37247, 68663, 180601, 1264207, 3070217, 21491519]

約数ペア:

[(1, 21491519), (7, 3070217), (17, 1264207), (119, 180601), (313, 68663), (577, 37247), (2191, 9809), (4039, 5321)]