81180040

素因数分解:

$2^3\times 5^1\times {\mathrm{2029501}}^1$

素因数の和:2029512

約数の個数: 16

約数和(自身を含む): 182655180

約数和(自身を除く): 101475140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2029501, 4059002, 8118004, 10147505, 16236008, 20295010, 40590020, 81180040]

約数ペア:

[(1, 81180040), (2, 40590020), (4, 20295010), (5, 16236008), (8, 10147505), (10, 8118004), (20, 4059002), (40, 2029501)]