256579281

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{1663}}^1$

素因数の和:1786

約数の個数: 48

約数和(自身を含む): 443023360

約数和(自身を除く): 186444079

約数列:

[1, 3, 7, 9, 21, 31, 63, 79, 93, 217, 237, 279, 553, 651, 711, 1659, 1663, 1953, 2449, 4977, 4989, 7347, 11641, 14967, 17143, 22041, 34923, 51429, 51553, 104769, 131377, 154287, 154659, 360871, 394131, 463977, 919639, 1082613, 1182393, 2758917, 3247839, 4072687, 8276751, 12218061, 28508809, 36654183, 85526427, 256579281]

約数ペア:

[(1, 256579281), (3, 85526427), (7, 36654183), (9, 28508809), (21, 12218061), (31, 8276751), (63, 4072687), (79, 3247839), (93, 2758917), (217, 1182393), (237, 1082613), (279, 919639), (553, 463977), (651, 394131), (711, 360871), (1659, 154659), (1663, 154287), (1953, 131377), (2449, 104769), (4977, 51553), (4989, 51429), (7347, 34923), (11641, 22041), (14967, 17143)]