20648120

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1327}}^1$

素因数の和:1727

約数の個数: 32

約数和(自身を含む): 46612800

約数和(自身を除く): 25964680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1327, 1556, 1945, 2654, 3112, 3890, 5308, 6635, 7780, 10616, 13270, 15560, 26540, 53080, 516203, 1032406, 2064812, 2581015, 4129624, 5162030, 10324060, 20648120]

約数ペア:

[(1, 20648120), (2, 10324060), (4, 5162030), (5, 4129624), (8, 2581015), (10, 2064812), (20, 1032406), (40, 516203), (389, 53080), (778, 26540), (1327, 15560), (1556, 13270), (1945, 10616), (2654, 7780), (3112, 6635), (3890, 5308)]