21509301

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1667}}^1$

素因数の和:1721

約数の個数: 32

約数和(自身を含む): 34587648

約数和(自身を除く): 13078347

約数列:

[1, 3, 11, 17, 23, 33, 51, 69, 187, 253, 391, 561, 759, 1173, 1667, 4301, 5001, 12903, 18337, 28339, 38341, 55011, 85017, 115023, 311729, 421751, 651797, 935187, 1265253, 1955391, 7169767, 21509301]

約数ペア:

[(1, 21509301), (3, 7169767), (11, 1955391), (17, 1265253), (23, 935187), (33, 651797), (51, 421751), (69, 311729), (187, 115023), (253, 85017), (391, 55011), (561, 38341), (759, 28339), (1173, 18337), (1667, 12903), (4301, 5001)]