21380645

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1759}}^1$

素因数の和:1805

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10552795

約数列:

[1, 5, 11, 13, 17, 55, 65, 85, 143, 187, 221, 715, 935, 1105, 1759, 2431, 8795, 12155, 19349, 22867, 29903, 96745, 114335, 149515, 251537, 328933, 388739, 1257685, 1644665, 1943695, 4276129, 21380645]

約数ペア:

[(1, 21380645), (5, 4276129), (11, 1943695), (13, 1644665), (17, 1257685), (55, 388739), (65, 328933), (85, 251537), (143, 149515), (187, 114335), (221, 96745), (715, 29903), (935, 22867), (1105, 19349), (1759, 12155), (2431, 8795)]