18999909

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{263}}^1\times {\mathrm{349}}^1$

素因数の和:641

約数の個数: 24

約数和(自身を含む): 28828800

約数和(自身を除く): 9828891

約数列:

[1, 3, 9, 23, 69, 207, 263, 349, 789, 1047, 2367, 3141, 6049, 8027, 18147, 24081, 54441, 72243, 91787, 275361, 826083, 2111101, 6333303, 18999909]

約数ペア:

[(1, 18999909), (3, 6333303), (9, 2111101), (23, 826083), (69, 275361), (207, 91787), (263, 72243), (349, 54441), (789, 24081), (1047, 18147), (2367, 8027), (3141, 6049)]