21981554

素因数分解:

$2^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{18917}}^1$

素因数の和:19009

約数の個数: 16

約数和(自身を含む): 38138688

約数和(自身を除く): 16157134

約数列:

[1, 2, 7, 14, 83, 166, 581, 1162, 18917, 37834, 132419, 264838, 1570111, 3140222, 10990777, 21981554]

約数ペア:

[(1, 21981554), (2, 10990777), (7, 3140222), (14, 1570111), (83, 264838), (166, 132419), (581, 37834), (1162, 18917)]