20813725

素因数分解:

$5^2\times {\mathrm{59}}^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:309

約数の個数: 24

約数和(自身を含む): 26694720

約数和(自身を除く): 5880995

約数列:

[1, 5, 25, 59, 103, 137, 295, 515, 685, 1475, 2575, 3425, 6077, 8083, 14111, 30385, 40415, 70555, 151925, 202075, 352775, 832549, 4162745, 20813725]

約数ペア:

[(1, 20813725), (5, 4162745), (25, 832549), (59, 352775), (103, 202075), (137, 151925), (295, 70555), (515, 40415), (685, 30385), (1475, 14111), (2575, 8083), (3425, 6077)]