20425640

素因数分解:

$2^3\times 5^1\times {\mathrm{563}}^1\times {\mathrm{907}}^1$

素因数の和:1481

約数の個数: 32

約数和(自身を含む): 46090080

約数和(自身を除く): 25664440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 563, 907, 1126, 1814, 2252, 2815, 3628, 4504, 4535, 5630, 7256, 9070, 11260, 18140, 22520, 36280, 510641, 1021282, 2042564, 2553205, 4085128, 5106410, 10212820, 20425640]

約数ペア:

[(1, 20425640), (2, 10212820), (4, 5106410), (5, 4085128), (8, 2553205), (10, 2042564), (20, 1021282), (40, 510641), (563, 36280), (907, 22520), (1126, 18140), (1814, 11260), (2252, 9070), (2815, 7256), (3628, 5630), (4504, 4535)]