21648543

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{337}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 36990720

約数和(自身を除く): 15342177

約数列:

[1, 3, 7, 19, 21, 23, 49, 57, 69, 133, 147, 161, 337, 399, 437, 483, 931, 1011, 1127, 1311, 2359, 2793, 3059, 3381, 6403, 7077, 7751, 9177, 16513, 19209, 21413, 23253, 44821, 49539, 54257, 64239, 134463, 147269, 162771, 313747, 379799, 441807, 941241, 1030883, 1139397, 3092649, 7216181, 21648543]

約数ペア:

[(1, 21648543), (3, 7216181), (7, 3092649), (19, 1139397), (21, 1030883), (23, 941241), (49, 441807), (57, 379799), (69, 313747), (133, 162771), (147, 147269), (161, 134463), (337, 64239), (399, 54257), (437, 49539), (483, 44821), (931, 23253), (1011, 21413), (1127, 19209), (1311, 16513), (2359, 9177), (2793, 7751), (3059, 7077), (3381, 6403)]