19238980

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{211}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 41884416

約数和(自身を除く): 22645436

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 97, 188, 194, 211, 235, 388, 422, 470, 485, 844, 940, 970, 1055, 1940, 2110, 4220, 4559, 9118, 9917, 18236, 19834, 20467, 22795, 39668, 40934, 45590, 49585, 81868, 91180, 99170, 102335, 198340, 204670, 409340, 961949, 1923898, 3847796, 4809745, 9619490, 19238980]

約数ペア:

[(1, 19238980), (2, 9619490), (4, 4809745), (5, 3847796), (10, 1923898), (20, 961949), (47, 409340), (94, 204670), (97, 198340), (188, 102335), (194, 99170), (211, 91180), (235, 81868), (388, 49585), (422, 45590), (470, 40934), (485, 39668), (844, 22795), (940, 20467), (970, 19834), (1055, 18236), (1940, 9917), (2110, 9118), (4220, 4559)]