21805208

素因数分解:

$2^3\times {\mathrm{139}}^1\times {\mathrm{19609}}^1$

素因数の和:19754

約数の個数: 16

約数和(自身を含む): 41181000

約数和(自身を除く): 19375792

約数列:

[1, 2, 4, 8, 139, 278, 556, 1112, 19609, 39218, 78436, 156872, 2725651, 5451302, 10902604, 21805208]

約数ペア:

[(1, 21805208), (2, 10902604), (4, 5451302), (8, 2725651), (139, 156872), (278, 78436), (556, 39218), (1112, 19609)]