21286155

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:192

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 18526965

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 71, 79, 115, 165, 213, 237, 253, 345, 355, 395, 759, 781, 869, 1065, 1185, 1265, 1633, 1817, 2343, 2607, 3795, 3905, 4345, 4899, 5451, 5609, 8165, 9085, 11715, 13035, 16827, 17963, 19987, 24495, 27255, 28045, 53889, 59961, 61699, 84135, 89815, 99935, 129007, 185097, 269445, 299805, 308495, 387021, 645035, 925485, 1419077, 1935105, 4257231, 7095385, 21286155]

約数ペア:

[(1, 21286155), (3, 7095385), (5, 4257231), (11, 1935105), (15, 1419077), (23, 925485), (33, 645035), (55, 387021), (69, 308495), (71, 299805), (79, 269445), (115, 185097), (165, 129007), (213, 99935), (237, 89815), (253, 84135), (345, 61699), (355, 59961), (395, 53889), (759, 28045), (781, 27255), (869, 24495), (1065, 19987), (1185, 17963), (1265, 16827), (1633, 13035), (1817, 11715), (2343, 9085), (2607, 8165), (3795, 5609), (3905, 5451), (4345, 4899)]