21271419

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{281}}^1\times {\mathrm{647}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 33257952

約数和(自身を除く): 11986533

約数列:

[1, 3, 9, 13, 39, 117, 281, 647, 843, 1941, 2529, 3653, 5823, 8411, 10959, 25233, 32877, 75699, 181807, 545421, 1636263, 2363491, 7090473, 21271419]

約数ペア:

[(1, 21271419), (3, 7090473), (9, 2363491), (13, 1636263), (39, 545421), (117, 181807), (281, 75699), (647, 32877), (843, 25233), (1941, 10959), (2529, 8411), (3653, 5823)]