20128725

素因数分解:

$3^2\times 5^2\times {\mathrm{137}}^1\times {\mathrm{653}}^1$

素因数の和:806

約数の個数: 36

約数和(自身を含む): 36371556

約数和(自身を除く): 16242831

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 137, 225, 411, 653, 685, 1233, 1959, 2055, 3265, 3425, 5877, 6165, 9795, 10275, 16325, 29385, 30825, 48975, 89461, 146925, 268383, 447305, 805149, 1341915, 2236525, 4025745, 6709575, 20128725]

約数ペア:

[(1, 20128725), (3, 6709575), (5, 4025745), (9, 2236525), (15, 1341915), (25, 805149), (45, 447305), (75, 268383), (137, 146925), (225, 89461), (411, 48975), (653, 30825), (685, 29385), (1233, 16325), (1959, 10275), (2055, 9795), (3265, 6165), (3425, 5877)]