21118461

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 36235584

約数和(自身を除く): 15117123

約数列:

[1, 3, 7, 13, 21, 39, 43, 49, 91, 129, 147, 257, 273, 301, 559, 637, 771, 903, 1677, 1799, 1911, 2107, 3341, 3913, 5397, 6321, 10023, 11051, 11739, 12593, 23387, 27391, 33153, 37779, 70161, 77357, 82173, 143663, 163709, 232071, 430989, 491127, 541499, 1005641, 1624497, 3016923, 7039487, 21118461]

約数ペア:

[(1, 21118461), (3, 7039487), (7, 3016923), (13, 1624497), (21, 1005641), (39, 541499), (43, 491127), (49, 430989), (91, 232071), (129, 163709), (147, 143663), (257, 82173), (273, 77357), (301, 70161), (559, 37779), (637, 33153), (771, 27391), (903, 23387), (1677, 12593), (1799, 11739), (1911, 11051), (2107, 10023), (3341, 6321), (3913, 5397)]