21171983

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{1229}}^1$

素因数の和:1366

約数の個数: 16

約数和(自身を含む): 25505280

約数和(自身を除く): 4333297

約数列:

[1, 7, 23, 107, 161, 749, 1229, 2461, 8603, 17227, 28267, 131503, 197869, 920521, 3024569, 21171983]

約数ペア:

[(1, 21171983), (7, 3024569), (23, 920521), (107, 197869), (161, 131503), (749, 28267), (1229, 17227), (2461, 8603)]