257529363

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{379}}^1$

素因数の和:552

約数の個数: 64

約数和(自身を含む): 449433600

約数和(自身を除く): 191904237

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 131, 133, 247, 273, 379, 393, 399, 741, 917, 1137, 1703, 1729, 2489, 2653, 2751, 4927, 5109, 5187, 7201, 7467, 7959, 11921, 14781, 17423, 21603, 32357, 34489, 35763, 49649, 50407, 52269, 93613, 97071, 103467, 148947, 151221, 226499, 280839, 347543, 645437, 655291, 679497, 943331, 1042629, 1936311, 1965873, 2829993, 4518059, 6603317, 12263303, 13554177, 19809951, 36789909, 85843121, 257529363]

約数ペア:

[(1, 257529363), (3, 85843121), (7, 36789909), (13, 19809951), (19, 13554177), (21, 12263303), (39, 6603317), (57, 4518059), (91, 2829993), (131, 1965873), (133, 1936311), (247, 1042629), (273, 943331), (379, 679497), (393, 655291), (399, 645437), (741, 347543), (917, 280839), (1137, 226499), (1703, 151221), (1729, 148947), (2489, 103467), (2653, 97071), (2751, 93613), (4927, 52269), (5109, 50407), (5187, 49649), (7201, 35763), (7467, 34489), (7959, 32357), (11921, 21603), (14781, 17423)]