21916408

素因数分解:

$2^3\times {\mathrm{139}}^1\times {\mathrm{19709}}^1$

素因数の和:19854

約数の個数: 16

約数和(自身を含む): 41391000

約数和(自身を除く): 19474592

約数列:

[1, 2, 4, 8, 139, 278, 556, 1112, 19709, 39418, 78836, 157672, 2739551, 5479102, 10958204, 21916408]

約数ペア:

[(1, 21916408), (2, 10958204), (4, 5479102), (8, 2739551), (139, 157672), (278, 78836), (556, 39418), (1112, 19709)]