19966540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{1931}}^1$

素因数の和:1998

約数の個数: 48

約数和(自身を含む): 46738944

約数和(自身を除く): 26772404

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 47, 55, 94, 110, 188, 220, 235, 470, 517, 940, 1034, 1931, 2068, 2585, 3862, 5170, 7724, 9655, 10340, 19310, 21241, 38620, 42482, 84964, 90757, 106205, 181514, 212410, 363028, 424820, 453785, 907570, 998327, 1815140, 1996654, 3993308, 4991635, 9983270, 19966540]

約数ペア:

[(1, 19966540), (2, 9983270), (4, 4991635), (5, 3993308), (10, 1996654), (11, 1815140), (20, 998327), (22, 907570), (44, 453785), (47, 424820), (55, 363028), (94, 212410), (110, 181514), (188, 106205), (220, 90757), (235, 84964), (470, 42482), (517, 38620), (940, 21241), (1034, 19310), (1931, 10340), (2068, 9655), (2585, 7724), (3862, 5170)]