21377260

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4159}}^1$

素因数の和:4425

約数の個数: 24

約数和(自身を含む): 45077760

約数和(自身を除く): 23700500

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4159, 5140, 8318, 16636, 20795, 41590, 83180, 1068863, 2137726, 4275452, 5344315, 10688630, 21377260]

約数ペア:

[(1, 21377260), (2, 10688630), (4, 5344315), (5, 4275452), (10, 2137726), (20, 1068863), (257, 83180), (514, 41590), (1028, 20795), (1285, 16636), (2570, 8318), (4159, 5140)]