21127959

素因数分解:

$3^4\times {\mathrm{59}}^1\times {\mathrm{4421}}^1$

素因数の和:4492

約数の個数: 20

約数和(自身を含む): 32103720

約数和(自身を除く): 10975761

約数列:

[1, 3, 9, 27, 59, 81, 177, 531, 1593, 4421, 4779, 13263, 39789, 119367, 260839, 358101, 782517, 2347551, 7042653, 21127959]

約数ペア:

[(1, 21127959), (3, 7042653), (9, 2347551), (27, 782517), (59, 358101), (81, 260839), (177, 119367), (531, 39789), (1593, 13263), (4421, 4779)]