19997320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71419}}^1$

素因数の和:71437

約数の個数: 32

約数和(自身を含む): 51422400

約数和(自身を除く): 31425080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 71419, 142838, 285676, 357095, 499933, 571352, 714190, 999866, 1428380, 1999732, 2499665, 2856760, 3999464, 4999330, 9998660, 19997320]

約数ペア:

[(1, 19997320), (2, 9998660), (4, 4999330), (5, 3999464), (7, 2856760), (8, 2499665), (10, 1999732), (14, 1428380), (20, 999866), (28, 714190), (35, 571352), (40, 499933), (56, 357095), (70, 285676), (140, 142838), (280, 71419)]