21097420

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7589}}^1$

素因数の和:7737

約数の個数: 24

約数和(自身を含む): 44629200

約数和(自身を除く): 23531780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7589, 15178, 30356, 37945, 75890, 151780, 1054871, 2109742, 4219484, 5274355, 10548710, 21097420]

約数ペア:

[(1, 21097420), (2, 10548710), (4, 5274355), (5, 4219484), (10, 2109742), (20, 1054871), (139, 151780), (278, 75890), (556, 37945), (695, 30356), (1390, 15178), (2780, 7589)]