18521620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71237}}^1$

素因数の和:71259

約数の個数: 24

約数和(自身を含む): 41887944

約数和(自身を除く): 23366324

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 71237, 142474, 284948, 356185, 712370, 926081, 1424740, 1852162, 3704324, 4630405, 9260810, 18521620]

約数ペア:

[(1, 18521620), (2, 9260810), (4, 4630405), (5, 3704324), (10, 1852162), (13, 1424740), (20, 926081), (26, 712370), (52, 356185), (65, 284948), (130, 142474), (260, 71237)]