9902990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{52121}}^1$

素因数の和:52147

約数の個数: 16

約数和(自身を含む): 18763920

約数和(自身を除く): 8860930

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 52121, 104242, 260605, 521210, 990299, 1980598, 4951495, 9902990]

約数ペア:

[(1, 9902990), (2, 4951495), (5, 1980598), (10, 990299), (19, 521210), (38, 260605), (95, 104242), (190, 52121)]