65999980

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{23741}}^1$

素因数の和:23889

約数の個数: 24

約数和(自身を含む): 139602960

約数和(自身を除く): 73602980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 23741, 47482, 94964, 118705, 237410, 474820, 3299999, 6599998, 13199996, 16499995, 32999990, 65999980]

約数ペア:

[(1, 65999980), (2, 32999990), (4, 16499995), (5, 13199996), (10, 6599998), (20, 3299999), (139, 474820), (278, 237410), (556, 118705), (695, 94964), (1390, 47482), (2780, 23741)]