161581520

素因数分解:

$2^4\times 5^1\times {\mathrm{2019769}}^1$

素因数の和:2019782

約数の個数: 20

約数和(自身を含む): 375677220

約数和(自身を除く): 214095700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2019769, 4039538, 8079076, 10098845, 16158152, 20197690, 32316304, 40395380, 80790760, 161581520]

約数ペア:

[(1, 161581520), (2, 80790760), (4, 40395380), (5, 32316304), (8, 20197690), (10, 16158152), (16, 10098845), (20, 8079076), (40, 4039538), (80, 2019769)]