21139911

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{281}}^1\times {\mathrm{643}}^1$

素因数の和:943

約数の個数: 24

約数和(自身を含む): 33052656

約数和(自身を除く): 11912745

約数列:

[1, 3, 9, 13, 39, 117, 281, 643, 843, 1929, 2529, 3653, 5787, 8359, 10959, 25077, 32877, 75231, 180683, 542049, 1626147, 2348879, 7046637, 21139911]

約数ペア:

[(1, 21139911), (3, 7046637), (9, 2348879), (13, 1626147), (39, 542049), (117, 180683), (281, 75231), (643, 32877), (843, 25077), (1929, 10959), (2529, 8359), (3653, 5787)]