20380840

素因数分解:

$2^3\times 5^1\times {\mathrm{509521}}^1$

素因数の和:509532

約数の個数: 16

約数和(自身を含む): 45856980

約数和(自身を除く): 25476140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 509521, 1019042, 2038084, 2547605, 4076168, 5095210, 10190420, 20380840]

約数ペア:

[(1, 20380840), (2, 10190420), (4, 5095210), (5, 4076168), (8, 2547605), (10, 2038084), (20, 1019042), (40, 509521)]