21049060

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61909}}^1$

素因数の和:61935

約数の個数: 24

約数和(自身を含む): 46803960

約数和(自身を除く): 25754900

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61909, 123818, 247636, 309545, 619090, 1052453, 1238180, 2104906, 4209812, 5262265, 10524530, 21049060]

約数ペア:

[(1, 21049060), (2, 10524530), (4, 5262265), (5, 4209812), (10, 2104906), (17, 1238180), (20, 1052453), (34, 619090), (68, 309545), (85, 247636), (170, 123818), (340, 61909)]