21806829

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 36676224

約数和(自身を除く): 14869395

約数列:

[1, 3, 9, 11, 23, 33, 61, 69, 99, 157, 183, 207, 253, 471, 549, 671, 759, 1403, 1413, 1727, 2013, 2277, 3611, 4209, 5181, 6039, 9577, 10833, 12627, 15433, 15543, 28731, 32499, 39721, 46299, 86193, 105347, 119163, 138897, 220271, 316041, 357489, 660813, 948123, 1982439, 2422981, 7268943, 21806829]

約数ペア:

[(1, 21806829), (3, 7268943), (9, 2422981), (11, 1982439), (23, 948123), (33, 660813), (61, 357489), (69, 316041), (99, 220271), (157, 138897), (183, 119163), (207, 105347), (253, 86193), (471, 46299), (549, 39721), (671, 32499), (759, 28731), (1403, 15543), (1413, 15433), (1727, 12627), (2013, 10833), (2277, 9577), (3611, 6039), (4209, 5181)]