639907489

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{563}}^1$

素因数の和:769

約数の個数: 32

約数和(自身を含む): 756120960

約数和(自身を除く): 116213471

約数列:

[1, 13, 17, 37, 139, 221, 481, 563, 629, 1807, 2363, 5143, 7319, 8177, 9571, 20831, 30719, 66859, 78257, 87431, 124423, 270803, 354127, 1017341, 1136603, 1330369, 2895509, 4603651, 17294797, 37641617, 49223653, 639907489]

約数ペア:

[(1, 639907489), (13, 49223653), (17, 37641617), (37, 17294797), (139, 4603651), (221, 2895509), (481, 1330369), (563, 1136603), (629, 1017341), (1807, 354127), (2363, 270803), (5143, 124423), (7319, 87431), (8177, 78257), (9571, 66859), (20831, 30719)]