2807800

素因数分解:

$2^3\times 5^2\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 6640200

約数和(自身を除く): 3832400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 101, 139, 200, 202, 278, 404, 505, 556, 695, 808, 1010, 1112, 1390, 2020, 2525, 2780, 3475, 4040, 5050, 5560, 6950, 10100, 13900, 14039, 20200, 27800, 28078, 56156, 70195, 112312, 140390, 280780, 350975, 561560, 701950, 1403900, 2807800]

約数ペア:

[(1, 2807800), (2, 1403900), (4, 701950), (5, 561560), (8, 350975), (10, 280780), (20, 140390), (25, 112312), (40, 70195), (50, 56156), (100, 28078), (101, 27800), (139, 20200), (200, 14039), (202, 13900), (278, 10100), (404, 6950), (505, 5560), (556, 5050), (695, 4040), (808, 3475), (1010, 2780), (1112, 2525), (1390, 2020)]