1640603920

素因数分解:

$2^4\times 5^1\times {\mathrm{20507549}}^1$

素因数の和:20507562

約数の個数: 20

約数和(自身を含む): 3814404300

約数和(自身を除く): 2173800380

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 20507549, 41015098, 82030196, 102537745, 164060392, 205075490, 328120784, 410150980, 820301960, 1640603920]

約数ペア:

[(1, 1640603920), (2, 820301960), (4, 410150980), (5, 328120784), (8, 205075490), (10, 164060392), (16, 102537745), (20, 82030196), (40, 41015098), (80, 20507549)]