20721039

素因数分解:

$3^1\times {\mathrm{19}}^4\times {\mathrm{53}}^1$

素因数の和:132

約数の個数: 20

約数和(自身を含む): 29713176

約数和(自身を除く): 8992137

約数列:

[1, 3, 19, 53, 57, 159, 361, 1007, 1083, 3021, 6859, 19133, 20577, 57399, 130321, 363527, 390963, 1090581, 6907013, 20721039]

約数ペア:

[(1, 20721039), (3, 6907013), (19, 1090581), (53, 390963), (57, 363527), (159, 130321), (361, 57399), (1007, 20577), (1083, 19133), (3021, 6859)]