21091827

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1\times {\mathrm{1217}}^1$

素因数の和:1382

約数の個数: 16

約数和(自身を含む): 28939680

約数和(自身を除く): 7847853

約数列:

[1, 3, 53, 109, 159, 327, 1217, 3651, 5777, 17331, 64501, 132653, 193503, 397959, 7030609, 21091827]

約数ペア:

[(1, 21091827), (3, 7030609), (53, 397959), (109, 193503), (159, 132653), (327, 64501), (1217, 17331), (3651, 5777)]