25915880

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{2521}}^1$

素因数の和:2789

約数の個数: 32

約数和(自身を含む): 58560840

約数和(自身を除く): 32644960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2521, 2570, 5042, 5140, 10084, 10280, 12605, 20168, 25210, 50420, 100840, 647897, 1295794, 2591588, 3239485, 5183176, 6478970, 12957940, 25915880]

約数ペア:

[(1, 25915880), (2, 12957940), (4, 6478970), (5, 5183176), (8, 3239485), (10, 2591588), (20, 1295794), (40, 647897), (257, 100840), (514, 50420), (1028, 25210), (1285, 20168), (2056, 12605), (2521, 10280), (2570, 10084), (5042, 5140)]