19404220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{457}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 44781408

約数和(自身を除く): 25377188

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 193, 220, 386, 457, 772, 914, 965, 1828, 1930, 2123, 2285, 3860, 4246, 4570, 5027, 8492, 9140, 10054, 10615, 20108, 21230, 25135, 42460, 50270, 88201, 100540, 176402, 352804, 441005, 882010, 970211, 1764020, 1940422, 3880844, 4851055, 9702110, 19404220]

約数ペア:

[(1, 19404220), (2, 9702110), (4, 4851055), (5, 3880844), (10, 1940422), (11, 1764020), (20, 970211), (22, 882010), (44, 441005), (55, 352804), (110, 176402), (193, 100540), (220, 88201), (386, 50270), (457, 42460), (772, 25135), (914, 21230), (965, 20108), (1828, 10615), (1930, 10054), (2123, 9140), (2285, 8492), (3860, 5027), (4246, 4570)]