18864940

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1427}}^1$

素因数の和:2097

約数の個数: 24

約数和(自身を含む): 39704112

約数和(自身を除く): 20839172

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 1427, 2644, 2854, 3305, 5708, 6610, 7135, 13220, 14270, 28540, 943247, 1886494, 3772988, 4716235, 9432470, 18864940]

約数ペア:

[(1, 18864940), (2, 9432470), (4, 4716235), (5, 3772988), (10, 1886494), (20, 943247), (661, 28540), (1322, 14270), (1427, 13220), (2644, 7135), (2854, 6610), (3305, 5708)]