20688280

素因数分解:

$2^3\times 5^1\times {\mathrm{517207}}^1$

素因数の和:517218

約数の個数: 16

約数和(自身を含む): 46548720

約数和(自身を除く): 25860440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 517207, 1034414, 2068828, 2586035, 4137656, 5172070, 10344140, 20688280]

約数ペア:

[(1, 20688280), (2, 10344140), (4, 5172070), (5, 4137656), (8, 2586035), (10, 2068828), (20, 1034414), (40, 517207)]