20517416

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{347}}^1\times {\mathrm{389}}^1$

素因数の和:761

約数の個数: 32

約数和(自身を含む): 40716000

約数和(自身を除く): 20198584

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 347, 389, 694, 778, 1388, 1556, 2776, 3112, 6593, 7391, 13186, 14782, 26372, 29564, 52744, 59128, 134983, 269966, 539932, 1079864, 2564677, 5129354, 10258708, 20517416]

約数ペア:

[(1, 20517416), (2, 10258708), (4, 5129354), (8, 2564677), (19, 1079864), (38, 539932), (76, 269966), (152, 134983), (347, 59128), (389, 52744), (694, 29564), (778, 26372), (1388, 14782), (1556, 13186), (2776, 7391), (3112, 6593)]