20747140

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{439}}^1$

素因数の和:604

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 25822460

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 139, 170, 278, 340, 439, 556, 695, 878, 1390, 1756, 2195, 2363, 2780, 4390, 4726, 7463, 8780, 9452, 11815, 14926, 23630, 29852, 37315, 47260, 61021, 74630, 122042, 149260, 244084, 305105, 610210, 1037357, 1220420, 2074714, 4149428, 5186785, 10373570, 20747140]

約数ペア:

[(1, 20747140), (2, 10373570), (4, 5186785), (5, 4149428), (10, 2074714), (17, 1220420), (20, 1037357), (34, 610210), (68, 305105), (85, 244084), (139, 149260), (170, 122042), (278, 74630), (340, 61021), (439, 47260), (556, 37315), (695, 29852), (878, 23630), (1390, 14926), (1756, 11815), (2195, 9452), (2363, 8780), (2780, 7463), (4390, 4726)]