20255540

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 44008272

約数和(自身を除く): 23752732

約数列:

[1, 2, 4, 5, 10, 20, 53, 97, 106, 194, 197, 212, 265, 388, 394, 485, 530, 788, 970, 985, 1060, 1940, 1970, 3940, 5141, 10282, 10441, 19109, 20564, 20882, 25705, 38218, 41764, 51410, 52205, 76436, 95545, 102820, 104410, 191090, 208820, 382180, 1012777, 2025554, 4051108, 5063885, 10127770, 20255540]

約数ペア:

[(1, 20255540), (2, 10127770), (4, 5063885), (5, 4051108), (10, 2025554), (20, 1012777), (53, 382180), (97, 208820), (106, 191090), (194, 104410), (197, 102820), (212, 95545), (265, 76436), (388, 52205), (394, 51410), (485, 41764), (530, 38218), (788, 25705), (970, 20882), (985, 20564), (1060, 19109), (1940, 10441), (1970, 10282), (3940, 5141)]