21721761

素因数分解:

$3^2\times {\mathrm{79}}^1\times {\mathrm{137}}^1\times {\mathrm{223}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 32148480

約数和(自身を除く): 10426719

約数列:

[1, 3, 9, 79, 137, 223, 237, 411, 669, 711, 1233, 2007, 10823, 17617, 30551, 32469, 52851, 91653, 97407, 158553, 274959, 2413529, 7240587, 21721761]

約数ペア:

[(1, 21721761), (3, 7240587), (9, 2413529), (79, 274959), (137, 158553), (223, 97407), (237, 91653), (411, 52851), (669, 32469), (711, 30551), (1233, 17617), (2007, 10823)]