18720548

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{457}}^1$

素因数の和:505

約数の個数: 72

約数和(自身を含む): 43858080

約数和(自身を除く): 25137532

約数列:

[1, 2, 4, 7, 11, 14, 19, 22, 28, 38, 44, 49, 76, 77, 98, 133, 154, 196, 209, 266, 308, 418, 457, 532, 539, 836, 914, 931, 1078, 1463, 1828, 1862, 2156, 2926, 3199, 3724, 5027, 5852, 6398, 8683, 10054, 10241, 12796, 17366, 20108, 20482, 22393, 34732, 35189, 40964, 44786, 60781, 70378, 89572, 95513, 121562, 140756, 191026, 243124, 246323, 382052, 425467, 492646, 668591, 850934, 985292, 1337182, 1701868, 2674364, 4680137, 9360274, 18720548]

約数ペア:

[(1, 18720548), (2, 9360274), (4, 4680137), (7, 2674364), (11, 1701868), (14, 1337182), (19, 985292), (22, 850934), (28, 668591), (38, 492646), (44, 425467), (49, 382052), (76, 246323), (77, 243124), (98, 191026), (133, 140756), (154, 121562), (196, 95513), (209, 89572), (266, 70378), (308, 60781), (418, 44786), (457, 40964), (532, 35189), (539, 34732), (836, 22393), (914, 20482), (931, 20108), (1078, 17366), (1463, 12796), (1828, 10241), (1862, 10054), (2156, 8683), (2926, 6398), (3199, 5852), (3724, 5027)]