21678855

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:176

約数の個数: 64

約数和(自身を含む): 40186368

約数和(自身を除く): 18507513

約数列:

[1, 3, 5, 11, 15, 33, 37, 53, 55, 67, 111, 159, 165, 185, 201, 265, 335, 407, 555, 583, 737, 795, 1005, 1221, 1749, 1961, 2035, 2211, 2479, 2915, 3551, 3685, 5883, 6105, 7437, 8745, 9805, 10653, 11055, 12395, 17755, 21571, 27269, 29415, 37185, 39061, 53265, 64713, 81807, 107855, 117183, 131387, 136345, 195305, 323565, 394161, 409035, 585915, 656935, 1445257, 1970805, 4335771, 7226285, 21678855]

約数ペア:

[(1, 21678855), (3, 7226285), (5, 4335771), (11, 1970805), (15, 1445257), (33, 656935), (37, 585915), (53, 409035), (55, 394161), (67, 323565), (111, 195305), (159, 136345), (165, 131387), (185, 117183), (201, 107855), (265, 81807), (335, 64713), (407, 53265), (555, 39061), (583, 37185), (737, 29415), (795, 27269), (1005, 21571), (1221, 17755), (1749, 12395), (1961, 11055), (2035, 10653), (2211, 9805), (2479, 8745), (2915, 7437), (3551, 6105), (3685, 5883)]