28521207

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:205

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 22281993

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 83, 89, 99, 117, 143, 249, 267, 297, 351, 429, 747, 801, 913, 979, 1079, 1157, 1287, 2241, 2403, 2739, 2937, 3237, 3471, 3861, 7387, 8217, 8811, 9711, 10413, 11869, 12727, 22161, 24651, 26433, 29133, 31239, 35607, 38181, 66483, 81257, 96031, 106821, 114543, 199449, 243771, 288093, 320463, 343629, 731313, 864279, 1056341, 2193939, 2592837, 3169023, 9507069, 28521207]

約数ペア:

[(1, 28521207), (3, 9507069), (9, 3169023), (11, 2592837), (13, 2193939), (27, 1056341), (33, 864279), (39, 731313), (83, 343629), (89, 320463), (99, 288093), (117, 243771), (143, 199449), (249, 114543), (267, 106821), (297, 96031), (351, 81257), (429, 66483), (747, 38181), (801, 35607), (913, 31239), (979, 29133), (1079, 26433), (1157, 24651), (1287, 22161), (2241, 12727), (2403, 11869), (2739, 10413), (2937, 9711), (3237, 8811), (3471, 8217), (3861, 7387)]