18281151

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 31569408

約数和(自身を除く): 13288257

約数列:

[1, 3, 7, 9, 21, 61, 63, 67, 71, 183, 201, 213, 427, 469, 497, 549, 603, 639, 1281, 1407, 1491, 3843, 4087, 4221, 4331, 4473, 4757, 12261, 12993, 14271, 28609, 30317, 33299, 36783, 38979, 42813, 85827, 90951, 99897, 257481, 272853, 290177, 299691, 870531, 2031239, 2611593, 6093717, 18281151]

約数ペア:

[(1, 18281151), (3, 6093717), (7, 2611593), (9, 2031239), (21, 870531), (61, 299691), (63, 290177), (67, 272853), (71, 257481), (183, 99897), (201, 90951), (213, 85827), (427, 42813), (469, 38979), (497, 36783), (549, 33299), (603, 30317), (639, 28609), (1281, 14271), (1407, 12993), (1491, 12261), (3843, 4757), (4087, 4473), (4221, 4331)]