218179521

素因数分解:

$3^3\times 7^1\times {\mathrm{71}}^2\times {\mathrm{229}}^1$

素因数の和:387

約数の個数: 48

約数和(自身を含む): 376316800

約数和(自身を除く): 158137279

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 189, 213, 229, 497, 639, 687, 1491, 1603, 1917, 2061, 4473, 4809, 5041, 6183, 13419, 14427, 15123, 16259, 35287, 43281, 45369, 48777, 105861, 113813, 136107, 146331, 317583, 341439, 438993, 952749, 1024317, 1154389, 3072951, 3463167, 8080723, 10389501, 24242169, 31168503, 72726507, 218179521]

約数ペア:

[(1, 218179521), (3, 72726507), (7, 31168503), (9, 24242169), (21, 10389501), (27, 8080723), (63, 3463167), (71, 3072951), (189, 1154389), (213, 1024317), (229, 952749), (497, 438993), (639, 341439), (687, 317583), (1491, 146331), (1603, 136107), (1917, 113813), (2061, 105861), (4473, 48777), (4809, 45369), (5041, 43281), (6183, 35287), (13419, 16259), (14427, 15123)]