20455565

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{809}}^1$

素因数の和:1216

約数の個数: 16

約数和(自身を含む): 26535600

約数和(自身を除く): 6080035

約数列:

[1, 5, 13, 65, 389, 809, 1945, 4045, 5057, 10517, 25285, 52585, 314701, 1573505, 4091113, 20455565]

約数ペア:

[(1, 20455565), (5, 4091113), (13, 1573505), (65, 314701), (389, 52585), (809, 25285), (1945, 10517), (4045, 5057)]