161563180

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{19751}}^1$

素因数の和:20169

約数の個数: 24

約数和(自身を含む): 340129440

約数和(自身を除く): 178566260

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 8180, 19751, 39502, 79004, 98755, 197510, 395020, 8078159, 16156318, 32312636, 40390795, 80781590, 161563180]

約数ペア:

[(1, 161563180), (2, 80781590), (4, 40390795), (5, 32312636), (10, 16156318), (20, 8078159), (409, 395020), (818, 197510), (1636, 98755), (2045, 79004), (4090, 39502), (8180, 19751)]