19706725

素因数分解:

$5^2\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:309

約数の個数: 24

約数和(自身を含む): 25310880

約数和(自身を除く): 5604155

約数列:

[1, 5, 25, 53, 107, 139, 265, 535, 695, 1325, 2675, 3475, 5671, 7367, 14873, 28355, 36835, 74365, 141775, 184175, 371825, 788269, 3941345, 19706725]

約数ペア:

[(1, 19706725), (5, 3941345), (25, 788269), (53, 371825), (107, 184175), (139, 141775), (265, 74365), (535, 36835), (695, 28355), (1325, 14873), (2675, 7367), (3475, 5671)]