19963120

素因数分解:

$2^4\times 5^1\times {\mathrm{249539}}^1$

素因数の和:249552

約数の個数: 20

約数和(自身を含む): 46414440

約数和(自身を除く): 26451320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249539, 499078, 998156, 1247695, 1996312, 2495390, 3992624, 4990780, 9981560, 19963120]

約数ペア:

[(1, 19963120), (2, 9981560), (4, 4990780), (5, 3992624), (8, 2495390), (10, 1996312), (16, 1247695), (20, 998156), (40, 499078), (80, 249539)]