19511120

素因数分解:

$2^4\times 5^1\times {\mathrm{243889}}^1$

素因数の和:243902

約数の個数: 20

約数和(自身を含む): 45363540

約数和(自身を除く): 25852420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243889, 487778, 975556, 1219445, 1951112, 2438890, 3902224, 4877780, 9755560, 19511120]

約数ペア:

[(1, 19511120), (2, 9755560), (4, 4877780), (5, 3902224), (8, 2438890), (10, 1951112), (16, 1219445), (20, 975556), (40, 487778), (80, 243889)]