19994403

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 33367040

約数和(自身を除く): 13372637

約数列:

[1, 3, 11, 13, 19, 33, 39, 57, 121, 143, 209, 223, 247, 363, 429, 627, 669, 741, 1573, 2299, 2453, 2717, 2899, 4237, 4719, 6897, 7359, 8151, 8697, 12711, 26983, 29887, 31889, 46607, 55081, 80949, 89661, 95667, 139821, 165243, 350779, 512677, 605891, 1052337, 1538031, 1817673, 6664801, 19994403]

約数ペア:

[(1, 19994403), (3, 6664801), (11, 1817673), (13, 1538031), (19, 1052337), (33, 605891), (39, 512677), (57, 350779), (121, 165243), (143, 139821), (209, 95667), (223, 89661), (247, 80949), (363, 55081), (429, 46607), (627, 31889), (669, 29887), (741, 26983), (1573, 12711), (2299, 8697), (2453, 8151), (2717, 7359), (2899, 6897), (4237, 4719)]