20451560

素因数分解:

$2^3\times 5^1\times {\mathrm{511289}}^1$

素因数の和:511300

約数の個数: 16

約数和(自身を含む): 46016100

約数和(自身を除く): 25564540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 511289, 1022578, 2045156, 2556445, 4090312, 5112890, 10225780, 20451560]

約数ペア:

[(1, 20451560), (2, 10225780), (4, 5112890), (5, 4090312), (8, 2556445), (10, 2045156), (20, 1022578), (40, 511289)]