21660399

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{42223}}^1$

素因数の和:42251

約数の個数: 16

約数和(自身を含む): 33779200

約数和(自身を除く): 12118801

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 42223, 126669, 380007, 802237, 1140021, 2406711, 7220133, 21660399]

約数ペア:

[(1, 21660399), (3, 7220133), (9, 2406711), (19, 1140021), (27, 802237), (57, 380007), (171, 126669), (513, 42223)]