21581036

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{283961}}^1$

素因数の和:283984

約数の個数: 12

約数和(自身を含む): 39754680

約数和(自身を除く): 18173644

約数列:

[1, 2, 4, 19, 38, 76, 283961, 567922, 1135844, 5395259, 10790518, 21581036]

約数ペア:

[(1, 21581036), (2, 10790518), (4, 5395259), (19, 1135844), (38, 567922), (76, 283961)]