21620753

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{199}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7409647

約数列:

[1, 7, 11, 17, 77, 83, 119, 187, 199, 581, 913, 1309, 1393, 1411, 2189, 3383, 6391, 9877, 15323, 15521, 16517, 23681, 37213, 108647, 115619, 181687, 260491, 280789, 1271809, 1965523, 3088679, 21620753]

約数ペア:

[(1, 21620753), (7, 3088679), (11, 1965523), (17, 1271809), (77, 280789), (83, 260491), (119, 181687), (187, 115619), (199, 108647), (581, 37213), (913, 23681), (1309, 16517), (1393, 15521), (1411, 15323), (2189, 9877), (3383, 6391)]