263121265

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{208001}}^1$

素因数の和:208040

約数の個数: 16

約数和(自身を含む): 359427456

約数和(自身を除く): 96306191

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 208001, 1040005, 2288011, 4784023, 11440055, 23920115, 52624253, 263121265]

約数ペア:

[(1, 263121265), (5, 52624253), (11, 23920115), (23, 11440055), (55, 4784023), (115, 2288011), (253, 1040005), (1265, 208001)]