20665905

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{809}}^1$

素因数の和:961

約数の個数: 32

約数和(自身を含む): 35925120

約数和(自身を除く): 15259215

約数列:

[1, 3, 5, 13, 15, 39, 65, 131, 195, 393, 655, 809, 1703, 1965, 2427, 4045, 5109, 8515, 10517, 12135, 25545, 31551, 52585, 105979, 157755, 317937, 529895, 1377727, 1589685, 4133181, 6888635, 20665905]

約数ペア:

[(1, 20665905), (3, 6888635), (5, 4133181), (13, 1589685), (15, 1377727), (39, 529895), (65, 317937), (131, 157755), (195, 105979), (393, 52585), (655, 31551), (809, 25545), (1703, 12135), (1965, 10517), (2427, 8515), (4045, 5109)]