20208980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{947}}^1$

素因数の和:1064

約数の個数: 48

約数和(自身を含む): 46823616

約数和(自身を除く): 26614636

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 97, 110, 194, 220, 388, 485, 947, 970, 1067, 1894, 1940, 2134, 3788, 4268, 4735, 5335, 9470, 10417, 10670, 18940, 20834, 21340, 41668, 52085, 91859, 104170, 183718, 208340, 367436, 459295, 918590, 1010449, 1837180, 2020898, 4041796, 5052245, 10104490, 20208980]

約数ペア:

[(1, 20208980), (2, 10104490), (4, 5052245), (5, 4041796), (10, 2020898), (11, 1837180), (20, 1010449), (22, 918590), (44, 459295), (55, 367436), (97, 208340), (110, 183718), (194, 104170), (220, 91859), (388, 52085), (485, 41668), (947, 21340), (970, 20834), (1067, 18940), (1894, 10670), (1940, 10417), (2134, 9470), (3788, 5335), (4268, 4735)]