78220040

素因数分解:

$2^3\times 5^1\times {\mathrm{1955501}}^1$

素因数の和:1955512

約数の個数: 16

約数和(自身を含む): 175995180

約数和(自身を除く): 97775140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1955501, 3911002, 7822004, 9777505, 15644008, 19555010, 39110020, 78220040]

約数ペア:

[(1, 78220040), (2, 39110020), (4, 19555010), (5, 15644008), (8, 9777505), (10, 7822004), (20, 3911002), (40, 1955501)]