19019920

素因数分解:

$2^4\times 5^1\times {\mathrm{237749}}^1$

素因数の和:237762

約数の個数: 20

約数和(自身を含む): 44221500

約数和(自身を除く): 25201580

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 237749, 475498, 950996, 1188745, 1901992, 2377490, 3803984, 4754980, 9509960, 19019920]

約数ペア:

[(1, 19019920), (2, 9509960), (4, 4754980), (5, 3803984), (8, 2377490), (10, 1901992), (16, 1188745), (20, 950996), (40, 475498), (80, 237749)]