20815028

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{613}}^1\times {\mathrm{653}}^1$

素因数の和:1283

約数の個数: 24

約数和(自身を含む): 39352488

約数和(自身を除く): 18537460

約数列:

[1, 2, 4, 13, 26, 52, 613, 653, 1226, 1306, 2452, 2612, 7969, 8489, 15938, 16978, 31876, 33956, 400289, 800578, 1601156, 5203757, 10407514, 20815028]

約数ペア:

[(1, 20815028), (2, 10407514), (4, 5203757), (13, 1601156), (26, 800578), (52, 400289), (613, 33956), (653, 31876), (1226, 16978), (1306, 15938), (2452, 8489), (2612, 7969)]