821123457

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1\times {\mathrm{239}}^1$

素因数の和:506

約数の個数: 64

約数和(自身を含む): 1393459200

約数和(自身を除く): 572335743

約数列:

[1, 3, 7, 11, 21, 33, 77, 107, 139, 231, 239, 321, 417, 717, 749, 973, 1177, 1529, 1673, 2247, 2629, 2919, 3531, 4587, 5019, 7887, 8239, 10703, 14873, 18403, 24717, 25573, 32109, 33221, 44619, 55209, 76719, 99663, 104111, 163603, 179011, 232547, 281303, 312333, 365431, 490809, 537033, 697641, 843909, 1096293, 1145221, 1969121, 2558017, 3435663, 3554647, 5907363, 7674051, 10663941, 24882529, 39101117, 74647587, 117303351, 273707819, 821123457]

約数ペア:

[(1, 821123457), (3, 273707819), (7, 117303351), (11, 74647587), (21, 39101117), (33, 24882529), (77, 10663941), (107, 7674051), (139, 5907363), (231, 3554647), (239, 3435663), (321, 2558017), (417, 1969121), (717, 1145221), (749, 1096293), (973, 843909), (1177, 697641), (1529, 537033), (1673, 490809), (2247, 365431), (2629, 312333), (2919, 281303), (3531, 232547), (4587, 179011), (5019, 163603), (7887, 104111), (8239, 99663), (10703, 76719), (14873, 55209), (18403, 44619), (24717, 33221), (25573, 32109)]