21258765

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{641}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 40862016

約数和(自身を除く): 19603251

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 67, 99, 165, 201, 335, 495, 603, 641, 737, 1005, 1923, 2211, 3015, 3205, 3685, 5769, 6633, 7051, 9615, 11055, 21153, 28845, 33165, 35255, 42947, 63459, 105765, 128841, 214735, 317295, 386523, 472417, 644205, 1417251, 1932615, 2362085, 4251753, 7086255, 21258765]

約数ペア:

[(1, 21258765), (3, 7086255), (5, 4251753), (9, 2362085), (11, 1932615), (15, 1417251), (33, 644205), (45, 472417), (55, 386523), (67, 317295), (99, 214735), (165, 128841), (201, 105765), (335, 63459), (495, 42947), (603, 35255), (641, 33165), (737, 28845), (1005, 21153), (1923, 11055), (2211, 9615), (3015, 7051), (3205, 6633), (3685, 5769)]