21504840

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25601}}^1$

素因数の和:25622

約数の個数: 64

約数和(自身を含む): 73733760

約数和(自身を除く): 52228920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25601, 51202, 76803, 102404, 128005, 153606, 179207, 204808, 256010, 307212, 358414, 384015, 512020, 537621, 614424, 716828, 768030, 896035, 1024040, 1075242, 1433656, 1536060, 1792070, 2150484, 2688105, 3072120, 3584140, 4300968, 5376210, 7168280, 10752420, 21504840]

約数ペア:

[(1, 21504840), (2, 10752420), (3, 7168280), (4, 5376210), (5, 4300968), (6, 3584140), (7, 3072120), (8, 2688105), (10, 2150484), (12, 1792070), (14, 1536060), (15, 1433656), (20, 1075242), (21, 1024040), (24, 896035), (28, 768030), (30, 716828), (35, 614424), (40, 537621), (42, 512020), (56, 384015), (60, 358414), (70, 307212), (84, 256010), (105, 204808), (120, 179207), (140, 153606), (168, 128005), (210, 102404), (280, 76803), (420, 51202), (840, 25601)]