257684505

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1321459}}^1$

素因数の和:1321480

約数の個数: 16

約数和(自身を含む): 444010560

約数和(自身を除く): 186326055

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 1321459, 3964377, 6607295, 17178967, 19821885, 51536901, 85894835, 257684505]

約数ペア:

[(1, 257684505), (3, 85894835), (5, 51536901), (13, 19821885), (15, 17178967), (39, 6607295), (65, 3964377), (195, 1321459)]