15639760

素因数分解:

$2^4\times 5^1\times {\mathrm{195497}}^1$

素因数の和:195510

約数の個数: 20

約数和(自身を含む): 36362628

約数和(自身を除く): 20722868

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 195497, 390994, 781988, 977485, 1563976, 1954970, 3127952, 3909940, 7819880, 15639760]

約数ペア:

[(1, 15639760), (2, 7819880), (4, 3909940), (5, 3127952), (8, 1954970), (10, 1563976), (16, 977485), (20, 781988), (40, 390994), (80, 195497)]