256218963

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{2081}}^1$

素因数の和:2156

約数の個数: 64

約数和(自身を含む): 470098944

約数和(自身を除く): 213879981

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 41, 77, 91, 123, 143, 231, 273, 287, 429, 451, 533, 861, 1001, 1353, 1599, 2081, 3003, 3157, 3731, 5863, 6243, 9471, 11193, 14567, 17589, 22891, 27053, 41041, 43701, 68673, 81159, 85321, 123123, 160237, 189371, 255963, 297583, 480711, 568113, 597247, 892749, 938531, 1109173, 1791741, 2083081, 2815593, 3327519, 6249243, 6569717, 7764211, 12200903, 19709151, 23292633, 36602709, 85406321, 256218963]

約数ペア:

[(1, 256218963), (3, 85406321), (7, 36602709), (11, 23292633), (13, 19709151), (21, 12200903), (33, 7764211), (39, 6569717), (41, 6249243), (77, 3327519), (91, 2815593), (123, 2083081), (143, 1791741), (231, 1109173), (273, 938531), (287, 892749), (429, 597247), (451, 568113), (533, 480711), (861, 297583), (1001, 255963), (1353, 189371), (1599, 160237), (2081, 123123), (3003, 85321), (3157, 81159), (3731, 68673), (5863, 43701), (6243, 41041), (9471, 27053), (11193, 22891), (14567, 17589)]