19883780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1303}}^1$

素因数の和:1428

約数の個数: 48

約数和(自身を含む): 48195840

約数和(自身を除く): 28312060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1303, 1526, 2180, 2606, 3052, 3815, 5212, 6515, 7630, 9121, 13030, 15260, 18242, 26060, 36484, 45605, 91210, 142027, 182420, 284054, 568108, 710135, 994189, 1420270, 1988378, 2840540, 3976756, 4970945, 9941890, 19883780]

約数ペア:

[(1, 19883780), (2, 9941890), (4, 4970945), (5, 3976756), (7, 2840540), (10, 1988378), (14, 1420270), (20, 994189), (28, 710135), (35, 568108), (70, 284054), (109, 182420), (140, 142027), (218, 91210), (436, 45605), (545, 36484), (763, 26060), (1090, 18242), (1303, 15260), (1526, 13030), (2180, 9121), (2606, 7630), (3052, 6515), (3815, 5212)]