81630423

素因数分解:

$3^4\times 7^2\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:314

約数の個数: 60

約数和(自身を含む): 143843832

約数和(自身を除く): 62213409

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 131, 147, 157, 189, 393, 441, 471, 567, 917, 1099, 1179, 1323, 1413, 2751, 3297, 3537, 3969, 4239, 6419, 7693, 8253, 9891, 10611, 12717, 19257, 20567, 23079, 24759, 29673, 57771, 61701, 69237, 74277, 89019, 143969, 173313, 185103, 207711, 431907, 519939, 555309, 623133, 1007783, 1295721, 1665927, 3023349, 3887163, 9070047, 11661489, 27210141, 81630423]

約数ペア:

[(1, 81630423), (3, 27210141), (7, 11661489), (9, 9070047), (21, 3887163), (27, 3023349), (49, 1665927), (63, 1295721), (81, 1007783), (131, 623133), (147, 555309), (157, 519939), (189, 431907), (393, 207711), (441, 185103), (471, 173313), (567, 143969), (917, 89019), (1099, 74277), (1179, 69237), (1323, 61701), (1413, 57771), (2751, 29673), (3297, 24759), (3537, 23079), (3969, 20567), (4239, 19257), (6419, 12717), (7693, 10611), (8253, 9891)]