161888990

素因数分解:

$2^1\times 5^1\times {\mathrm{809}}^1\times {\mathrm{20011}}^1$

素因数の和:20827

約数の個数: 16

約数和(自身を含む): 291774960

約数和(自身を除く): 129885970

約数列:

[1, 2, 5, 10, 809, 1618, 4045, 8090, 20011, 40022, 100055, 200110, 16188899, 32377798, 80944495, 161888990]

約数ペア:

[(1, 161888990), (2, 80944495), (5, 32377798), (10, 16188899), (809, 200110), (1618, 100055), (4045, 40022), (8090, 20011)]