21688881

素因数分解:

$3^1\times {\mathrm{113}}^1\times {\mathrm{137}}^1\times {\mathrm{467}}^1$

素因数の和:720

約数の個数: 16

約数和(自身を含む): 29450304

約数和(自身を除く): 7761423

約数列:

[1, 3, 113, 137, 339, 411, 467, 1401, 15481, 46443, 52771, 63979, 158313, 191937, 7229627, 21688881]

約数ペア:

[(1, 21688881), (3, 7229627), (113, 191937), (137, 158313), (339, 63979), (411, 52771), (467, 46443), (1401, 15481)]