21489712

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{18917}}^1$

素因数の和:18996

約数の個数: 20

約数和(自身を含む): 42224976

約数和(自身を除く): 20735264

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 18917, 37834, 75668, 151336, 302672, 1343107, 2686214, 5372428, 10744856, 21489712]

約数ペア:

[(1, 21489712), (2, 10744856), (4, 5372428), (8, 2686214), (16, 1343107), (71, 302672), (142, 151336), (284, 75668), (568, 37834), (1136, 18917)]