21870729

素因数分解:

$3^6\times {\mathrm{19}}^1\times {\mathrm{1579}}^1$

素因数の和:1616

約数の個数: 28

約数和(自身を含む): 34538800

約数和(自身を除く): 12668071

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 243, 513, 729, 1539, 1579, 4617, 4737, 13851, 14211, 30001, 42633, 90003, 127899, 270009, 383697, 810027, 1151091, 2430081, 7290243, 21870729]

約数ペア:

[(1, 21870729), (3, 7290243), (9, 2430081), (19, 1151091), (27, 810027), (57, 383697), (81, 270009), (171, 127899), (243, 90003), (513, 42633), (729, 30001), (1539, 14211), (1579, 13851), (4617, 4737)]