21251321

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{673}}^1$

素因数の和:1040

約数の個数: 16

約数和(自身を含む): 26269824

約数和(自身を除く): 5018503

約数列:

[1, 7, 13, 91, 347, 673, 2429, 4511, 4711, 8749, 31577, 61243, 233531, 1634717, 3035903, 21251321]

約数ペア:

[(1, 21251321), (7, 3035903), (13, 1634717), (91, 233531), (347, 61243), (673, 31577), (2429, 8749), (4511, 4711)]