21157716

素因数分解:

$2^2\times 3^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1307}}^1$

素因数の和:1404

約数の個数: 48

約数和(自身を含む): 52738560

約数和(自身を除く): 31580844

約数列:

[1, 2, 3, 4, 6, 12, 19, 38, 57, 71, 76, 114, 142, 213, 228, 284, 426, 852, 1307, 1349, 2614, 2698, 3921, 4047, 5228, 5396, 7842, 8094, 15684, 16188, 24833, 49666, 74499, 92797, 99332, 148998, 185594, 278391, 297996, 371188, 556782, 1113564, 1763143, 3526286, 5289429, 7052572, 10578858, 21157716]

約数ペア:

[(1, 21157716), (2, 10578858), (3, 7052572), (4, 5289429), (6, 3526286), (12, 1763143), (19, 1113564), (38, 556782), (57, 371188), (71, 297996), (76, 278391), (114, 185594), (142, 148998), (213, 99332), (228, 92797), (284, 74499), (426, 49666), (852, 24833), (1307, 16188), (1349, 15684), (2614, 8094), (2698, 7842), (3921, 5396), (4047, 5228)]