1081420

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{389}}^1$

素因数の和:537

約数の個数: 24

約数和(自身を含む): 2293200

約数和(自身を除く): 1211780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 389, 556, 695, 778, 1390, 1556, 1945, 2780, 3890, 7780, 54071, 108142, 216284, 270355, 540710, 1081420]

約数ペア:

[(1, 1081420), (2, 540710), (4, 270355), (5, 216284), (10, 108142), (20, 54071), (139, 7780), (278, 3890), (389, 2780), (556, 1945), (695, 1556), (778, 1390)]