18888740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72649}}^1$

素因数の和:72671

約数の個数: 24

約数和(自身を含む): 42718200

約数和(自身を除く): 23829460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72649, 145298, 290596, 363245, 726490, 944437, 1452980, 1888874, 3777748, 4722185, 9444370, 18888740]

約数ペア:

[(1, 18888740), (2, 9444370), (4, 4722185), (5, 3777748), (10, 1888874), (13, 1452980), (20, 944437), (26, 726490), (52, 363245), (65, 290596), (130, 145298), (260, 72649)]