18986149

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1$

素因数の和:257

約数の個数: 32

約数和(自身を含む): 25088000

約数和(自身を除く): 6101851

約数列:

[1, 7, 13, 19, 79, 91, 133, 139, 247, 553, 973, 1027, 1501, 1729, 1807, 2641, 7189, 10507, 10981, 12649, 18487, 19513, 34333, 76867, 136591, 142753, 208639, 240331, 999271, 1460473, 2712307, 18986149]

約数ペア:

[(1, 18986149), (7, 2712307), (13, 1460473), (19, 999271), (79, 240331), (91, 208639), (133, 142753), (139, 136591), (247, 76867), (553, 34333), (973, 19513), (1027, 18487), (1501, 12649), (1729, 10981), (1807, 10507), (2641, 7189)]