21165705

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{4751}}^1$

素因数の和:4779

約数の個数: 40

約数和(自身を含む): 41399424

約数和(自身を除く): 20233719

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 135, 165, 297, 405, 495, 891, 1485, 4455, 4751, 14253, 23755, 42759, 52261, 71265, 128277, 156783, 213795, 261305, 384831, 470349, 641385, 783915, 1411047, 1924155, 2351745, 4233141, 7055235, 21165705]

約数ペア:

[(1, 21165705), (3, 7055235), (5, 4233141), (9, 2351745), (11, 1924155), (15, 1411047), (27, 783915), (33, 641385), (45, 470349), (55, 384831), (81, 261305), (99, 213795), (135, 156783), (165, 128277), (297, 71265), (405, 52261), (495, 42759), (891, 23755), (1485, 14253), (4455, 4751)]