20457880

素因数分解:

$2^3\times 5^1\times {\mathrm{511447}}^1$

素因数の和:511458

約数の個数: 16

約数和(自身を含む): 46030320

約数和(自身を除く): 25572440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 511447, 1022894, 2045788, 2557235, 4091576, 5114470, 10228940, 20457880]

約数ペア:

[(1, 20457880), (2, 10228940), (4, 5114470), (5, 4091576), (8, 2557235), (10, 2045788), (20, 1022894), (40, 511447)]