21441721

素因数分解:

$7^1\times {\mathrm{59}}^1\times {\mathrm{193}}^1\times {\mathrm{269}}^1$

素因数の和:528

約数の個数: 16

約数和(自身を含む): 25142400

約数和(自身を除く): 3700679

約数列:

[1, 7, 59, 193, 269, 413, 1351, 1883, 11387, 15871, 51917, 79709, 111097, 363419, 3063103, 21441721]

約数ペア:

[(1, 21441721), (7, 3063103), (59, 363419), (193, 111097), (269, 79709), (413, 51917), (1351, 15871), (1883, 11387)]