19786780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76103}}^1$

素因数の和:76125

約数の個数: 24

約数和(自身を含む): 44749152

約数和(自身を除く): 24962372

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76103, 152206, 304412, 380515, 761030, 989339, 1522060, 1978678, 3957356, 4946695, 9893390, 19786780]

約数ペア:

[(1, 19786780), (2, 9893390), (4, 4946695), (5, 3957356), (10, 1978678), (13, 1522060), (20, 989339), (26, 761030), (52, 380515), (65, 304412), (130, 152206), (260, 76103)]