645265

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:240

約数の個数: 16

約数和(自身を含む): 838656

約数和(自身を除く): 193391

約数列:

[1, 5, 23, 31, 115, 155, 181, 713, 905, 3565, 4163, 5611, 20815, 28055, 129053, 645265]

約数ペア:

[(1, 645265), (5, 129053), (23, 28055), (31, 20815), (115, 5611), (155, 4163), (181, 3565), (713, 905)]