784667020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{8779}}^1$

素因数の和:8938

約数の個数: 48

約数和(自身を含む): 1703671200

約数和(自身を除く): 919004180

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 109, 164, 205, 218, 410, 436, 545, 820, 1090, 2180, 4469, 8779, 8938, 17558, 17876, 22345, 35116, 43895, 44690, 87790, 89380, 175580, 359939, 719878, 956911, 1439756, 1799695, 1913822, 3599390, 3827644, 4784555, 7198780, 9569110, 19138220, 39233351, 78466702, 156933404, 196166755, 392333510, 784667020]

約数ペア:

[(1, 784667020), (2, 392333510), (4, 196166755), (5, 156933404), (10, 78466702), (20, 39233351), (41, 19138220), (82, 9569110), (109, 7198780), (164, 4784555), (205, 3827644), (218, 3599390), (410, 1913822), (436, 1799695), (545, 1439756), (820, 956911), (1090, 719878), (2180, 359939), (4469, 175580), (8779, 89380), (8938, 87790), (17558, 44690), (17876, 43895), (22345, 35116)]