678989860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1997029}}^1$

素因数の和:1997055

約数の個数: 24

約数和(自身を含む): 1509754680

約数和(自身を除く): 830764820

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 1997029, 3994058, 7988116, 9985145, 19970290, 33949493, 39940580, 67898986, 135797972, 169747465, 339494930, 678989860]

約数ペア:

[(1, 678989860), (2, 339494930), (4, 169747465), (5, 135797972), (10, 67898986), (17, 39940580), (20, 33949493), (34, 19970290), (68, 9985145), (85, 7988116), (170, 3994058), (340, 1997029)]