21243495

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{197}}^1$

素因数の和:304

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 21334425

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 79, 91, 105, 195, 197, 237, 273, 395, 455, 553, 591, 985, 1027, 1185, 1365, 1379, 1659, 2561, 2765, 2955, 3081, 4137, 5135, 6895, 7189, 7683, 8295, 12805, 15405, 15563, 17927, 20685, 21567, 35945, 38415, 46689, 53781, 77815, 89635, 107835, 108941, 202319, 233445, 268905, 326823, 544705, 606957, 1011595, 1416233, 1634115, 3034785, 4248699, 7081165, 21243495]

約数ペア:

[(1, 21243495), (3, 7081165), (5, 4248699), (7, 3034785), (13, 1634115), (15, 1416233), (21, 1011595), (35, 606957), (39, 544705), (65, 326823), (79, 268905), (91, 233445), (105, 202319), (195, 108941), (197, 107835), (237, 89635), (273, 77815), (395, 53781), (455, 46689), (553, 38415), (591, 35945), (985, 21567), (1027, 20685), (1185, 17927), (1365, 15563), (1379, 15405), (1659, 12805), (2561, 8295), (2765, 7683), (2955, 7189), (3081, 6895), (4137, 5135)]