18734920

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4297}}^1$

素因数の和:4417

約数の個数: 32

約数和(自身を含む): 42550200

約数和(自身を除く): 23815280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4297, 4360, 8594, 17188, 21485, 34376, 42970, 85940, 171880, 468373, 936746, 1873492, 2341865, 3746984, 4683730, 9367460, 18734920]

約数ペア:

[(1, 18734920), (2, 9367460), (4, 4683730), (5, 3746984), (8, 2341865), (10, 1873492), (20, 936746), (40, 468373), (109, 171880), (218, 85940), (436, 42970), (545, 34376), (872, 21485), (1090, 17188), (2180, 8594), (4297, 4360)]