19007720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{257}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 43955460

約数和(自身を除く): 24947740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 257, 344, 430, 514, 860, 1028, 1285, 1720, 1849, 2056, 2570, 3698, 5140, 7396, 9245, 10280, 11051, 14792, 18490, 22102, 36980, 44204, 55255, 73960, 88408, 110510, 221020, 442040, 475193, 950386, 1900772, 2375965, 3801544, 4751930, 9503860, 19007720]

約数ペア:

[(1, 19007720), (2, 9503860), (4, 4751930), (5, 3801544), (8, 2375965), (10, 1900772), (20, 950386), (40, 475193), (43, 442040), (86, 221020), (172, 110510), (215, 88408), (257, 73960), (344, 55255), (430, 44204), (514, 36980), (860, 22102), (1028, 18490), (1285, 14792), (1720, 11051), (1849, 10280), (2056, 9245), (2570, 7396), (3698, 5140)]