20903841

素因数分解:

$3^2\times 7^2\times {\mathrm{107}}^1\times {\mathrm{443}}^1$

素因数の和:570

約数の個数: 36

約数和(自身を含む): 35532432

約数和(自身を除く): 14628591

約数列:

[1, 3, 7, 9, 21, 49, 63, 107, 147, 321, 441, 443, 749, 963, 1329, 2247, 3101, 3987, 5243, 6741, 9303, 15729, 21707, 27909, 47187, 47401, 65121, 142203, 195363, 331807, 426609, 995421, 2322649, 2986263, 6967947, 20903841]

約数ペア:

[(1, 20903841), (3, 6967947), (7, 2986263), (9, 2322649), (21, 995421), (49, 426609), (63, 331807), (107, 195363), (147, 142203), (321, 65121), (441, 47401), (443, 47187), (749, 27909), (963, 21707), (1329, 15729), (2247, 9303), (3101, 6741), (3987, 5243)]