18971127

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 32947200

約数和(自身を除く): 13976073

約数列:

[1, 3, 7, 9, 21, 43, 47, 63, 129, 141, 149, 301, 329, 387, 423, 447, 903, 987, 1043, 1341, 2021, 2709, 2961, 3129, 6063, 6407, 7003, 9387, 14147, 18189, 19221, 21009, 42441, 44849, 49021, 57663, 63027, 127323, 134547, 147063, 301129, 403641, 441189, 903387, 2107903, 2710161, 6323709, 18971127]

約数ペア:

[(1, 18971127), (3, 6323709), (7, 2710161), (9, 2107903), (21, 903387), (43, 441189), (47, 403641), (63, 301129), (129, 147063), (141, 134547), (149, 127323), (301, 63027), (329, 57663), (387, 49021), (423, 44849), (447, 42441), (903, 21009), (987, 19221), (1043, 18189), (1341, 14147), (2021, 9387), (2709, 7003), (2961, 6407), (3129, 6063)]