19995580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{937}}^1$

素因数の和:1054

約数の個数: 48

約数和(自身を含む): 46329696

約数和(自身を除く): 26334116

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 97, 110, 194, 220, 388, 485, 937, 970, 1067, 1874, 1940, 2134, 3748, 4268, 4685, 5335, 9370, 10307, 10670, 18740, 20614, 21340, 41228, 51535, 90889, 103070, 181778, 206140, 363556, 454445, 908890, 999779, 1817780, 1999558, 3999116, 4998895, 9997790, 19995580]

約数ペア:

[(1, 19995580), (2, 9997790), (4, 4998895), (5, 3999116), (10, 1999558), (11, 1817780), (20, 999779), (22, 908890), (44, 454445), (55, 363556), (97, 206140), (110, 181778), (194, 103070), (220, 90889), (388, 51535), (485, 41228), (937, 21340), (970, 20614), (1067, 18740), (1874, 10670), (1940, 10307), (2134, 9370), (3748, 5335), (4268, 4685)]