7850020

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1009}}^1$

素因数の和:1407

約数の個数: 24

約数和(自身を含む): 16543800

約数和(自身を除く): 8693780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1009, 1556, 1945, 2018, 3890, 4036, 5045, 7780, 10090, 20180, 392501, 785002, 1570004, 1962505, 3925010, 7850020]

約数ペア:

[(1, 7850020), (2, 3925010), (4, 1962505), (5, 1570004), (10, 785002), (20, 392501), (389, 20180), (778, 10090), (1009, 7780), (1556, 5045), (1945, 4036), (2018, 3890)]