21610239

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1321}}^1$

素因数の和:1391

約数の個数: 32

約数和(自身を含む): 35535360

約数和(自身を除く): 13925121

約数列:

[1, 3, 7, 19, 21, 41, 57, 123, 133, 287, 399, 779, 861, 1321, 2337, 3963, 5453, 9247, 16359, 25099, 27741, 54161, 75297, 162483, 175693, 379127, 527079, 1029059, 1137381, 3087177, 7203413, 21610239]

約数ペア:

[(1, 21610239), (3, 7203413), (7, 3087177), (19, 1137381), (21, 1029059), (41, 527079), (57, 379127), (123, 175693), (133, 162483), (287, 75297), (399, 54161), (779, 27741), (861, 25099), (1321, 16359), (2337, 9247), (3963, 5453)]