20852980

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4057}}^1$

素因数の和:4323

約数の個数: 24

約数和(自身を含む): 43972488

約数和(自身を除く): 23119508

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4057, 5140, 8114, 16228, 20285, 40570, 81140, 1042649, 2085298, 4170596, 5213245, 10426490, 20852980]

約数ペア:

[(1, 20852980), (2, 10426490), (4, 5213245), (5, 4170596), (10, 2085298), (20, 1042649), (257, 81140), (514, 40570), (1028, 20285), (1285, 16228), (2570, 8114), (4057, 5140)]