21137545

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:130

約数の個数: 64

約数和(自身を含む): 33094656

約数和(自身を除く): 11957111

約数列:

[1, 5, 11, 13, 17, 37, 47, 55, 65, 85, 143, 185, 187, 221, 235, 407, 481, 517, 611, 629, 715, 799, 935, 1105, 1739, 2035, 2405, 2431, 2585, 3055, 3145, 3995, 5291, 6721, 6919, 8177, 8695, 8789, 10387, 12155, 19129, 22607, 26455, 29563, 33605, 34595, 40885, 43945, 51935, 89947, 95645, 113035, 114257, 147815, 248677, 325193, 384319, 449735, 571285, 1243385, 1625965, 1921595, 4227509, 21137545]

約数ペア:

[(1, 21137545), (5, 4227509), (11, 1921595), (13, 1625965), (17, 1243385), (37, 571285), (47, 449735), (55, 384319), (65, 325193), (85, 248677), (143, 147815), (185, 114257), (187, 113035), (221, 95645), (235, 89947), (407, 51935), (481, 43945), (517, 40885), (611, 34595), (629, 33605), (715, 29563), (799, 26455), (935, 22607), (1105, 19129), (1739, 12155), (2035, 10387), (2405, 8789), (2431, 8695), (2585, 8177), (3055, 6919), (3145, 6721), (3995, 5291)]