20665281

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{1283}}^1$

素因数の和:1365

約数の個数: 32

約数和(自身を含む): 34513920

約数和(自身を除く): 13848639

約数列:

[1, 3, 7, 13, 21, 39, 59, 91, 177, 273, 413, 767, 1239, 1283, 2301, 3849, 5369, 8981, 16107, 16679, 26943, 50037, 75697, 116753, 227091, 350259, 529879, 984061, 1589637, 2952183, 6888427, 20665281]

約数ペア:

[(1, 20665281), (3, 6888427), (7, 2952183), (13, 1589637), (21, 984061), (39, 529879), (59, 350259), (91, 227091), (177, 116753), (273, 75697), (413, 50037), (767, 26943), (1239, 16679), (1283, 16107), (2301, 8981), (3849, 5369)]