21249351

素因数分解:

$3^3\times {\mathrm{73}}^1\times {\mathrm{10781}}^1$

素因数の和:10863

約数の個数: 16

約数和(自身を含む): 31914720

約数和(自身を除く): 10665369

約数列:

[1, 3, 9, 27, 73, 219, 657, 1971, 10781, 32343, 97029, 291087, 787013, 2361039, 7083117, 21249351]

約数ペア:

[(1, 21249351), (3, 7083117), (9, 2361039), (27, 787013), (73, 291087), (219, 97029), (657, 32343), (1971, 10781)]