21136185

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{3947}}^1$

素因数の和:3982

約数の個数: 48

約数和(自身を含む): 44343936

約数和(自身を除く): 23207751

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, 3947, 5355, 11841, 19735, 27629, 35523, 59205, 67099, 82887, 138145, 177615, 201297, 248661, 335495, 414435, 469693, 603891, 1006485, 1243305, 1409079, 2348465, 3019455, 4227237, 7045395, 21136185]

約数ペア:

[(1, 21136185), (3, 7045395), (5, 4227237), (7, 3019455), (9, 2348465), (15, 1409079), (17, 1243305), (21, 1006485), (35, 603891), (45, 469693), (51, 414435), (63, 335495), (85, 248661), (105, 201297), (119, 177615), (153, 138145), (255, 82887), (315, 67099), (357, 59205), (595, 35523), (765, 27629), (1071, 19735), (1785, 11841), (3947, 5355)]