205815880

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{20021}}^1$

素因数の和:20289

約数の個数: 32

約数和(自身を含む): 464910840

約数和(自身を除く): 259094960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2570, 5140, 10280, 20021, 40042, 80084, 100105, 160168, 200210, 400420, 800840, 5145397, 10290794, 20581588, 25726985, 41163176, 51453970, 102907940, 205815880]

約数ペア:

[(1, 205815880), (2, 102907940), (4, 51453970), (5, 41163176), (8, 25726985), (10, 20581588), (20, 10290794), (40, 5145397), (257, 800840), (514, 400420), (1028, 200210), (1285, 160168), (2056, 100105), (2570, 80084), (5140, 40042), (10280, 20021)]