13319980

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1039}}^1$

素因数の和:1689

約数の個数: 24

約数和(自身を含む): 28042560

約数和(自身を除く): 14722580

約数列:

[1, 2, 4, 5, 10, 20, 641, 1039, 1282, 2078, 2564, 3205, 4156, 5195, 6410, 10390, 12820, 20780, 665999, 1331998, 2663996, 3329995, 6659990, 13319980]

約数ペア:

[(1, 13319980), (2, 6659990), (4, 3329995), (5, 2663996), (10, 1331998), (20, 665999), (641, 20780), (1039, 12820), (1282, 10390), (2078, 6410), (2564, 5195), (3205, 4156)]