20394890

素因数分解:

$2^1\times 5^1\times {\mathrm{809}}^1\times {\mathrm{2521}}^1$

素因数の和:3337

約数の個数: 16

約数和(自身を含む): 36770760

約数和(自身を除く): 16375870

約数列:

[1, 2, 5, 10, 809, 1618, 2521, 4045, 5042, 8090, 12605, 25210, 2039489, 4078978, 10197445, 20394890]

約数ペア:

[(1, 20394890), (2, 10197445), (5, 4078978), (10, 2039489), (809, 25210), (1618, 12605), (2521, 8090), (4045, 5042)]