15981940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61469}}^1$

素因数の和:61491

約数の個数: 24

約数和(自身を含む): 36144360

約数和(自身を除く): 20162420

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 61469, 122938, 245876, 307345, 614690, 799097, 1229380, 1598194, 3196388, 3995485, 7990970, 15981940]

約数ペア:

[(1, 15981940), (2, 7990970), (4, 3995485), (5, 3196388), (10, 1598194), (13, 1229380), (20, 799097), (26, 614690), (52, 307345), (65, 245876), (130, 122938), (260, 61469)]