256978287

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{293}}^1$

素因数の和:564

約数の個数: 48

約数和(自身を含む): 410941440

約数和(自身を除く): 153963153

約数列:

[1, 3, 9, 19, 23, 57, 69, 171, 207, 223, 293, 437, 669, 879, 1311, 2007, 2637, 3933, 4237, 5129, 5567, 6739, 12711, 15387, 16701, 20217, 38133, 46161, 50103, 60651, 65339, 97451, 128041, 196017, 292353, 384123, 588051, 877059, 1152369, 1241441, 1502797, 3724323, 4508391, 11172969, 13525173, 28553143, 85659429, 256978287]

約数ペア:

[(1, 256978287), (3, 85659429), (9, 28553143), (19, 13525173), (23, 11172969), (57, 4508391), (69, 3724323), (171, 1502797), (207, 1241441), (223, 1152369), (293, 877059), (437, 588051), (669, 384123), (879, 292353), (1311, 196017), (2007, 128041), (2637, 97451), (3933, 65339), (4237, 60651), (5129, 50103), (5567, 46161), (6739, 38133), (12711, 20217), (15387, 16701)]