21508746

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{491}}^1$

素因数の和:659

約数の個数: 48

約数和(自身を含む): 50479200

約数和(自身を除く): 28970454

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 149, 294, 298, 447, 491, 894, 982, 1043, 1473, 2086, 2946, 3129, 3437, 6258, 6874, 7301, 10311, 14602, 20622, 21903, 24059, 43806, 48118, 72177, 73159, 144354, 146318, 219477, 438954, 512113, 1024226, 1536339, 3072678, 3584791, 7169582, 10754373, 21508746]

約数ペア:

[(1, 21508746), (2, 10754373), (3, 7169582), (6, 3584791), (7, 3072678), (14, 1536339), (21, 1024226), (42, 512113), (49, 438954), (98, 219477), (147, 146318), (149, 144354), (294, 73159), (298, 72177), (447, 48118), (491, 43806), (894, 24059), (982, 21903), (1043, 20622), (1473, 14602), (2086, 10311), (2946, 7301), (3129, 6874), (3437, 6258)]