21239817

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{8861}}^1$

素因数の和:8928

約数の個数: 16

約数和(自身を含む): 30627072

約数和(自身を除く): 9387255

約数列:

[1, 3, 17, 47, 51, 141, 799, 2397, 8861, 26583, 150637, 416467, 451911, 1249401, 7079939, 21239817]

約数ペア:

[(1, 21239817), (3, 7079939), (17, 1249401), (47, 451911), (51, 416467), (141, 150637), (799, 26583), (2397, 8861)]