21007665

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{3923}}^1$

素因数の和:3958

約数の個数: 48

約数和(自身を含む): 44074368

約数和(自身を除く): 23066703

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 3923, 5355, 11769, 19615, 27461, 35307, 58845, 66691, 82383, 137305, 176535, 200073, 247149, 333455, 411915, 466837, 600219, 1000365, 1235745, 1400511, 2334185, 3001095, 4201533, 7002555, 21007665]

約数ペア:

[(1, 21007665), (3, 7002555), (5, 4201533), (7, 3001095), (9, 2334185), (15, 1400511), (17, 1235745), (21, 1000365), (35, 600219), (45, 466837), (51, 411915), (63, 333455), (85, 247149), (105, 200073), (119, 176535), (153, 137305), (255, 82383), (315, 66691), (357, 58845), (595, 35307), (765, 27461), (1071, 19615), (1785, 11769), (3923, 5355)]