21402675

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{127}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 44568576

約数和(自身を除く): 23165901

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 107, 127, 175, 225, 315, 321, 381, 525, 535, 635, 749, 889, 963, 1143, 1575, 1605, 1905, 2247, 2667, 2675, 3175, 3745, 4445, 4815, 5715, 6741, 8001, 8025, 9525, 11235, 13335, 13589, 18725, 22225, 24075, 28575, 33705, 40005, 40767, 56175, 66675, 67945, 95123, 122301, 168525, 200025, 203835, 285369, 339725, 475615, 611505, 856107, 1019175, 1426845, 2378075, 3057525, 4280535, 7134225, 21402675]

約数ペア:

[(1, 21402675), (3, 7134225), (5, 4280535), (7, 3057525), (9, 2378075), (15, 1426845), (21, 1019175), (25, 856107), (35, 611505), (45, 475615), (63, 339725), (75, 285369), (105, 203835), (107, 200025), (127, 168525), (175, 122301), (225, 95123), (315, 67945), (321, 66675), (381, 56175), (525, 40767), (535, 40005), (635, 33705), (749, 28575), (889, 24075), (963, 22225), (1143, 18725), (1575, 13589), (1605, 13335), (1905, 11235), (2247, 9525), (2667, 8025), (2675, 8001), (3175, 6741), (3745, 5715), (4445, 4815)]