18020840

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1753}}^1$

素因数の和:2021

約数の個数: 32

約数和(自身を含む): 40727880

約数和(自身を除く): 22707040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 1753, 2056, 2570, 3506, 5140, 7012, 8765, 10280, 14024, 17530, 35060, 70120, 450521, 901042, 1802084, 2252605, 3604168, 4505210, 9010420, 18020840]

約数ペア:

[(1, 18020840), (2, 9010420), (4, 4505210), (5, 3604168), (8, 2252605), (10, 1802084), (20, 901042), (40, 450521), (257, 70120), (514, 35060), (1028, 17530), (1285, 14024), (1753, 10280), (2056, 8765), (2570, 7012), (3506, 5140)]