21353241

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:190

約数の個数: 64

約数和(自身を含む): 38320128

約数和(自身を除く): 16966887

約数列:

[1, 3, 7, 13, 17, 21, 39, 43, 51, 91, 107, 119, 129, 221, 273, 301, 321, 357, 559, 663, 731, 749, 903, 1391, 1547, 1677, 1819, 2193, 2247, 3913, 4173, 4601, 4641, 5117, 5457, 9503, 9737, 11739, 12733, 13803, 15351, 23647, 28509, 29211, 32207, 38199, 59813, 66521, 70941, 78217, 96621, 165529, 179439, 199563, 234651, 418691, 496587, 547519, 1016821, 1256073, 1642557, 3050463, 7117747, 21353241]

約数ペア:

[(1, 21353241), (3, 7117747), (7, 3050463), (13, 1642557), (17, 1256073), (21, 1016821), (39, 547519), (43, 496587), (51, 418691), (91, 234651), (107, 199563), (119, 179439), (129, 165529), (221, 96621), (273, 78217), (301, 70941), (321, 66521), (357, 59813), (559, 38199), (663, 32207), (731, 29211), (749, 28509), (903, 23647), (1391, 15351), (1547, 13803), (1677, 12733), (1819, 11739), (2193, 9737), (2247, 9503), (3913, 5457), (4173, 5117), (4601, 4641)]