91420040

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{8893}}^1$

素因数の和:9161

約数の個数: 32

約数和(自身を含む): 206518680

約数和(自身を除く): 115098640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2570, 5140, 8893, 10280, 17786, 35572, 44465, 71144, 88930, 177860, 355720, 2285501, 4571002, 9142004, 11427505, 18284008, 22855010, 45710020, 91420040]

約数ペア:

[(1, 91420040), (2, 45710020), (4, 22855010), (5, 18284008), (8, 11427505), (10, 9142004), (20, 4571002), (40, 2285501), (257, 355720), (514, 177860), (1028, 88930), (1285, 71144), (2056, 44465), (2570, 35572), (5140, 17786), (8893, 10280)]