20451249

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{24971}}^1$

素因数の和:24997

約数の個数: 24

約数和(自身を含む): 36359232

約数和(自身を除く): 15907983

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 24971, 74913, 174797, 224739, 324623, 524391, 973869, 1573173, 2272361, 2921607, 6817083, 20451249]

約数ペア:

[(1, 20451249), (3, 6817083), (7, 2921607), (9, 2272361), (13, 1573173), (21, 973869), (39, 524391), (63, 324623), (91, 224739), (117, 174797), (273, 74913), (819, 24971)]