21289473

素因数分解:

$3^5\times {\mathrm{79}}^1\times {\mathrm{1109}}^1$

素因数の和:1203

約数の個数: 24

約数和(自身を含む): 32323200

約数和(自身を除く): 11033727

約数列:

[1, 3, 9, 27, 79, 81, 237, 243, 711, 1109, 2133, 3327, 6399, 9981, 19197, 29943, 87611, 89829, 262833, 269487, 788499, 2365497, 7096491, 21289473]

約数ペア:

[(1, 21289473), (3, 7096491), (9, 2365497), (27, 788499), (79, 269487), (81, 262833), (237, 89829), (243, 87611), (711, 29943), (1109, 19197), (2133, 9981), (3327, 6399)]