19881245

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{3491}}^1$

素因数の和:3580

約数の個数: 16

約数和(自身を含む): 25645248

約数和(自身を除く): 5764003

約数列:

[1, 5, 17, 67, 85, 335, 1139, 3491, 5695, 17455, 59347, 233897, 296735, 1169485, 3976249, 19881245]

約数ペア:

[(1, 19881245), (5, 3976249), (17, 1169485), (67, 296735), (85, 233897), (335, 59347), (1139, 17455), (3491, 5695)]