21161360

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{173}}^1$

素因数の和:336

約数の個数: 80

約数和(自身を含む): 54371520

約数和(自身を除く): 33210160

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 139, 173, 176, 220, 278, 346, 440, 556, 692, 695, 865, 880, 1112, 1384, 1390, 1529, 1730, 1903, 2224, 2768, 2780, 3058, 3460, 3806, 5560, 6116, 6920, 7612, 7645, 9515, 11120, 12232, 13840, 15224, 15290, 19030, 24047, 24464, 30448, 30580, 38060, 48094, 61160, 76120, 96188, 120235, 122320, 152240, 192376, 240470, 264517, 384752, 480940, 529034, 961880, 1058068, 1322585, 1923760, 2116136, 2645170, 4232272, 5290340, 10580680, 21161360]

約数ペア:

[(1, 21161360), (2, 10580680), (4, 5290340), (5, 4232272), (8, 2645170), (10, 2116136), (11, 1923760), (16, 1322585), (20, 1058068), (22, 961880), (40, 529034), (44, 480940), (55, 384752), (80, 264517), (88, 240470), (110, 192376), (139, 152240), (173, 122320), (176, 120235), (220, 96188), (278, 76120), (346, 61160), (440, 48094), (556, 38060), (692, 30580), (695, 30448), (865, 24464), (880, 24047), (1112, 19030), (1384, 15290), (1390, 15224), (1529, 13840), (1730, 12232), (1903, 11120), (2224, 9515), (2768, 7645), (2780, 7612), (3058, 6920), (3460, 6116), (3806, 5560)]