19990964

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{709}}^1$

素因数の和:792

約数の個数: 48

約数和(自身を含む): 42940800

約数和(自身を除く): 22949836

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 53, 76, 106, 133, 212, 266, 371, 532, 709, 742, 1007, 1418, 1484, 2014, 2836, 4028, 4963, 7049, 9926, 13471, 14098, 19852, 26942, 28196, 37577, 53884, 75154, 94297, 150308, 188594, 263039, 377188, 526078, 713963, 1052156, 1427926, 2855852, 4997741, 9995482, 19990964]

約数ペア:

[(1, 19990964), (2, 9995482), (4, 4997741), (7, 2855852), (14, 1427926), (19, 1052156), (28, 713963), (38, 526078), (53, 377188), (76, 263039), (106, 188594), (133, 150308), (212, 94297), (266, 75154), (371, 53884), (532, 37577), (709, 28196), (742, 26942), (1007, 19852), (1418, 14098), (1484, 13471), (2014, 9926), (2836, 7049), (4028, 4963)]