19944280

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2531}}^1$

素因数の和:2739

約数の個数: 32

約数和(自身を含む): 45120240

約数和(自身を除く): 25175960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2531, 3940, 5062, 7880, 10124, 12655, 20248, 25310, 50620, 101240, 498607, 997214, 1994428, 2493035, 3988856, 4986070, 9972140, 19944280]

約数ペア:

[(1, 19944280), (2, 9972140), (4, 4986070), (5, 3988856), (8, 2493035), (10, 1994428), (20, 997214), (40, 498607), (197, 101240), (394, 50620), (788, 25310), (985, 20248), (1576, 12655), (1970, 10124), (2531, 7880), (3940, 5062)]