21416451

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{641}}^1$

素因数の和:731

約数の個数: 32

約数和(自身を含む): 34349568

約数和(自身を除く): 12933117

約数列:

[1, 3, 7, 21, 37, 43, 111, 129, 259, 301, 641, 777, 903, 1591, 1923, 4487, 4773, 11137, 13461, 23717, 27563, 33411, 71151, 82689, 166019, 192941, 498057, 578823, 1019831, 3059493, 7138817, 21416451]

約数ペア:

[(1, 21416451), (3, 7138817), (7, 3059493), (21, 1019831), (37, 578823), (43, 498057), (111, 192941), (129, 166019), (259, 82689), (301, 71151), (641, 33411), (777, 27563), (903, 23717), (1591, 13461), (1923, 11137), (4487, 4773)]