20561240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73433}}^1$

素因数の和:73451

約数の個数: 32

約数和(自身を含む): 52872480

約数和(自身を除く): 32311240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 73433, 146866, 293732, 367165, 514031, 587464, 734330, 1028062, 1468660, 2056124, 2570155, 2937320, 4112248, 5140310, 10280620, 20561240]

約数ペア:

[(1, 20561240), (2, 10280620), (4, 5140310), (5, 4112248), (7, 2937320), (8, 2570155), (10, 2056124), (14, 1468660), (20, 1028062), (28, 734330), (35, 587464), (40, 514031), (56, 367165), (70, 293732), (140, 146866), (280, 73433)]