4001998

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1999}}^1$

素因数の和:2032

約数の個数: 32

約数和(自身を含む): 8064000

約数和(自身を除く): 4062002

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 77, 91, 143, 154, 182, 286, 1001, 1999, 2002, 3998, 13993, 21989, 25987, 27986, 43978, 51974, 153923, 181909, 285857, 307846, 363818, 571714, 2000999, 4001998]

約数ペア:

[(1, 4001998), (2, 2000999), (7, 571714), (11, 363818), (13, 307846), (14, 285857), (22, 181909), (26, 153923), (77, 51974), (91, 43978), (143, 27986), (154, 25987), (182, 21989), (286, 13993), (1001, 3998), (1999, 2002)]