2016991120

素因数分解:

$2^4\times 5^1\times {\mathrm{25212389}}^1$

素因数の和:25212402

約数の個数: 20

約数和(自身を含む): 4689504540

約数和(自身を除く): 2672513420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 25212389, 50424778, 100849556, 126061945, 201699112, 252123890, 403398224, 504247780, 1008495560, 2016991120]

約数ペア:

[(1, 2016991120), (2, 1008495560), (4, 504247780), (5, 403398224), (8, 252123890), (10, 201699112), (16, 126061945), (20, 100849556), (40, 50424778), (80, 25212389)]