19797940

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{193}}^1\times {\mathrm{223}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 43803648

約数和(自身を除く): 24005708

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 193, 223, 230, 386, 446, 460, 772, 892, 965, 1115, 1930, 2230, 3860, 4439, 4460, 5129, 8878, 10258, 17756, 20516, 22195, 25645, 43039, 44390, 51290, 86078, 88780, 102580, 172156, 215195, 430390, 860780, 989897, 1979794, 3959588, 4949485, 9898970, 19797940]

約数ペア:

[(1, 19797940), (2, 9898970), (4, 4949485), (5, 3959588), (10, 1979794), (20, 989897), (23, 860780), (46, 430390), (92, 215195), (115, 172156), (193, 102580), (223, 88780), (230, 86078), (386, 51290), (446, 44390), (460, 43039), (772, 25645), (892, 22195), (965, 20516), (1115, 17756), (1930, 10258), (2230, 8878), (3860, 5129), (4439, 4460)]