21120248

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{3389}}^1$

素因数の和:3455

約数の個数: 32

約数和(自身を含む): 42714000

約数和(自身を除く): 21593752

約数列:

[1, 2, 4, 8, 19, 38, 41, 76, 82, 152, 164, 328, 779, 1558, 3116, 3389, 6232, 6778, 13556, 27112, 64391, 128782, 138949, 257564, 277898, 515128, 555796, 1111592, 2640031, 5280062, 10560124, 21120248]

約数ペア:

[(1, 21120248), (2, 10560124), (4, 5280062), (8, 2640031), (19, 1111592), (38, 555796), (41, 515128), (76, 277898), (82, 257564), (152, 138949), (164, 128782), (328, 64391), (779, 27112), (1558, 13556), (3116, 6778), (3389, 6232)]