21681718

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{4133}}^1$

素因数の和:4239

約数の個数: 16

約数和(自身を含む): 33832656

約数和(自身を除く): 12150938

約数列:

[1, 2, 43, 61, 86, 122, 2623, 4133, 5246, 8266, 177719, 252113, 355438, 504226, 10840859, 21681718]

約数ペア:

[(1, 21681718), (2, 10840859), (43, 504226), (61, 355438), (86, 252113), (122, 177719), (2623, 8266), (4133, 5246)]