20999741

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:185

約数の個数: 32

約数和(自身を含む): 26542080

約数和(自身を除く): 5542339

約数列:

[1, 7, 29, 31, 47, 71, 203, 217, 329, 497, 899, 1363, 1457, 2059, 2201, 3337, 6293, 9541, 10199, 14413, 15407, 23359, 42253, 63829, 96773, 103447, 295771, 446803, 677411, 724129, 2999963, 20999741]

約数ペア:

[(1, 20999741), (7, 2999963), (29, 724129), (31, 677411), (47, 446803), (71, 295771), (203, 103447), (217, 96773), (329, 63829), (497, 42253), (899, 23359), (1363, 15407), (1457, 14413), (2059, 10199), (2201, 9541), (3337, 6293)]